{"url":"http://public2.vulnerablecode.io/api/packages/26067?format=json","purl":"pkg:pypi/matrix-synapse@1.62.0rc1","type":"pypi","namespace":"","name":"matrix-synapse","version":"1.62.0rc1","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"1.106","latest_non_vulnerable_version":"1.152.1","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/69798?format=json","vulnerability_id":"VCID-1xwm-33sy-3qfv","summary":"Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, in federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse from providing full history to paginating clients. Clients could therefore fail to display room history. This vulnerability is fixed in 1.152.1.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-45076","reference_id":"","reference_type":"","scores":[{"value":"0.00091","scoring_system":"epss","scoring_elements":"0.25759","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00091","scoring_system":"epss","scoring_elements":"0.25959","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-45076"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2026-194.yaml","reference_id":"","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2026-194.yaml"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45076","reference_id":"","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45076"},{"reference_url":"https://github.com/advisories/GHSA-6qf2-7x63-mm6v","reference_id":"GHSA-6qf2-7x63-mm6v","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-6qf2-7x63-mm6v"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-6qf2-7x63-mm6v","reference_id":"GHSA-6qf2-7x63-mm6v","reference_type":"","scores":[{"value":"2.7","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-06-02T14:51:22Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-6qf2-7x63-mm6v"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/93940?format=json","purl":"pkg:pypi/matrix-synapse@1.152.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.152.1"}],"aliases":["CVE-2026-45076","CVE-2026-45076,","GHSA-6qf2-7x63-mm6v","PYSEC-2026-194"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-1xwm-33sy-3qfv"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/167250?format=json","vulnerability_id":"VCID-27ht-47d2-77f6","summary":"Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2022-31152","reference_id":"","reference_type":"","scores":[{"value":"0.00731","scoring_system":"epss","scoring_elements":"0.73228","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00731","scoring_system":"epss","scoring_elements":"0.73151","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-31152"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/matrix-org/synapse/commit/d4b1c0d800eaa83c4d56a9cf17881ad362b9194b","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/commit/d4b1c0d800eaa83c4d56a9cf17881ad362b9194b"},{"reference_url":"https://github.com/matrix-org/synapse/commit/e16ea87d0f8c4c30cad36f85488eb1f647e640b0","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/commit/e16ea87d0f8c4c30cad36f85488eb1f647e640b0"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2022-262.yaml","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2022-262.yaml"},{"reference_url":"https://github.com/matrix-org/synapse/pull/13087","reference_id":"13087","reference_type":"","scores":[{"value":"6.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H"},{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:01:29Z/"}],"url":"https://github.com/matrix-org/synapse/pull/13087"},{"reference_url":"https://github.com/matrix-org/synapse/pull/13088","reference_id":"13088","reference_type":"","scores":[{"value":"6.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H"},{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:01:29Z/"}],"url":"https://github.com/matrix-org/synapse/pull/13088"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31152","reference_id":"CVE-2022-31152","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31152"},{"reference_url":"https://github.com/advisories/GHSA-jhjh-776m-4765","reference_id":"GHSA-jhjh-776m-4765","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-jhjh-776m-4765"},{"reference_url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765","reference_id":"GHSA-jhjh-776m-4765","reference_type":"","scores":[{"value":"6.4","scoring_system":"cvssv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is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-31208","reference_id":"","reference_type":"","scores":[{"value":"0.0419","scoring_system":"epss","scoring_elements":"0.8897","published_at":"2026-06-11T12:55:00Z"},{"value":"0.0419","scoring_system":"epss","scoring_elements":"0.89008","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-31208"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2024-50.yaml","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2024-50.yaml"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVB","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVB"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RR53FNHV446CB37TP45GZ6F6HZLZCK3K","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RR53FNHV446CB37TP45GZ6F6HZLZCK3K"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSF4NJJSTSQRJQ47PLYYSCFYKJBP7DET","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSF4NJJSTSQRJQ47PLYYSCFYKJBP7DET"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1069763","reference_id":"1069763","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1069763"},{"reference_url":"https://github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a","reference_id":"55b0aa847a61774b6a3acdc4b177a20dc019f01a","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-04-23T19:13:09Z/"}],"url":"https://github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-31208","reference_id":"CVE-2024-31208","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-31208"},{"reference_url":"https://github.com/advisories/GHSA-3h7q-rfh9-xm4v","reference_id":"GHSA-3h7q-rfh9-xm4v","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-3h7q-rfh9-xm4v"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v","reference_id":"GHSA-3h7q-rfh9-xm4v","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-04-23T19:13:09Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVB/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is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known workarounds are available.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-30355","reference_id":"","reference_type":"","scores":[{"value":"0.13201","scoring_system":"epss","scoring_elements":"0.94296","published_at":"2026-06-11T12:55:00Z"},{"value":"0.13201","scoring_system":"epss","scoring_elements":"0.94317","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-30355"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"7.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30355","reference_id":"","reference_type":"","scores":[{"value":"7.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30355"},{"reference_url":"https://github.com/element-hq/synapse/commit/2277df2a1eb685f85040ef98fa21d41aa4cdd389","reference_id":"2277df2a1eb685f85040ef98fa21d41aa4cdd389","reference_type":"","scores":[{"value":"7.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-27T13:47:41Z/"}],"url":"https://github.com/element-hq/synapse/commit/2277df2a1eb685f85040ef98fa21d41aa4cdd389"},{"reference_url":"https://github.com/advisories/GHSA-v56r-hwv5-mxg6","reference_id":"GHSA-v56r-hwv5-mxg6","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-v56r-hwv5-mxg6"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-v56r-hwv5-mxg6","reference_id":"GHSA-v56r-hwv5-mxg6","reference_type":"","scores":[{"value":"7.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-27T13:47:41Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-v56r-hwv5-mxg6"},{"reference_url":"https://github.com/element-hq/synapse/releases/tag/v1.127.1","reference_id":"v1.127.1","reference_type":"","scores":[{"value":"7.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-27T13:47:41Z/"}],"url":"https://github.com/element-hq/synapse/releases/tag/v1.127.1"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/93875?format=json","purl":"pkg:pypi/matrix-synapse@1.127.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1xwm-33sy-3qfv"},{"vulnerability":"VCID-n8mv-4upg-hfa3"},{"vulnerability":"VCID-y6j7-eetd-pkfh"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.127.1"}],"aliases":["CVE-2025-30355","GHSA-v56r-hwv5-mxg6"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-3ngy-dt6j-tuef"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/135527?format=json","vulnerability_id":"VCID-5h97-3s9w-c3ab","summary":"Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room. This issue has been patched in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-42453","reference_id":"","reference_type":"","scores":[{"value":"0.00132","scoring_system":"epss","scoring_elements":"0.32515","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00132","scoring_system":"epss","scoring_elements":"0.32334","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-42453"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/matrix-org/synapse/commit/63d28a88c1d18c64ea7e23b6dd7483e6d5dcf881","reference_id":"","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/commit/63d28a88c1d18c64ea7e23b6dd7483e6d5dcf881"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-180.yaml","reference_id":"","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-180.yaml"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4","reference_id":"","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO","reference_id":"","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY","reference_id":"","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42453","reference_id":"","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42453"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1053283","reference_id":"1053283","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1053283"},{"reference_url":"https://github.com/matrix-org/synapse/pull/16327","reference_id":"16327","reference_type":"","scores":[{"value":"3.1","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C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public2.vulnerablecode.io/vulnerabilities/VCID-5h97-3s9w-c3ab"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/45042?format=json","vulnerability_id":"VCID-7v7h-zrjj-pkh3","summary":"Synapse is an open-source Matrix homeserver. Synapse versions before 1.106 are vulnerable to a disk fill attack, where an unauthenticated adversary can induce Synapse to download and cache large amounts of remote media. The default rate limit strategy is insufficient to mitigate this. This can lead to a denial of service, ranging from further media uploads/downloads failing to completely unavailability of the Synapse process, depending on how Synapse was deployed. Synapse 1.106 introduces a new \"leaky bucket\" rate limit on remote media downloads to reduce the amount of data a user can request at a time. This does not fully address the issue, but does limit an unauthenticated user's ability to request large amounts of data to be cached.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-37302","reference_id":"","reference_type":"","scores":[{"value":"0.00568","scoring_system":"epss","scoring_elements":"0.69089","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00568","scoring_system":"epss","scoring_elements":"0.68997","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-37302"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2024-286.yaml","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2024-286.yaml"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-37302","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-37302"},{"reference_url":"https://github.com/advisories/GHSA-4mhg-xv73-xq2x","reference_id":"GHSA-4mhg-xv73-xq2x","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-4mhg-xv73-xq2x"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-4mhg-xv73-xq2x","reference_id":"GHSA-4mhg-xv73-xq2x","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T18:55:21Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-4mhg-xv73-xq2x"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/372289?format=json","purl":"pkg:pypi/matrix-synapse@1.106","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.106"},{"url":"http://public2.vulnerablecode.io/api/packages/86739?format=json","purl":"pkg:pypi/matrix-synapse@1.106.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1xwm-33sy-3qfv"},{"vulnerability":"VCID-3ngy-dt6j-tuef"},{"vulnerability":"VCID-hqwh-2un3-bqd8"},{"vulnerability":"VCID-n8mv-4upg-hfa3"},{"vulnerability":"VCID-rcdd-qkxt-nuez"},{"vulnerability":"VCID-s1jf-x5ug-jqcq"},{"vulnerability":"VCID-y6j7-eetd-pkfh"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.106.0"}],"aliases":["CVE-2024-37302","GHSA-4mhg-xv73-xq2x","PYSEC-2024-286"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-7v7h-zrjj-pkh3"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/143452?format=json","vulnerability_id":"VCID-8n5g-1zby-77gj","summary":"Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of `invite_room_state`, meaning that it was possible to create an arbitrarily large invite event. Synapse 1.74 refuses to create oversized `invite_room_state` fields. Server operators should upgrade to Synapse 1.74 or newer urgently.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-32323","reference_id":"","reference_type":"","scores":[{"value":"0.00142","scoring_system":"epss","scoring_elements":"0.34178","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00142","scoring_system":"epss","scoring_elements":"0.34356","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-32323"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-67.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-67.yaml"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32323","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32323"},{"reference_url":"https://github.com/matrix-org/synapse/issues/14492","reference_id":"14492","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-14T20:00:17Z/"}],"url":"https://github.com/matrix-org/synapse/issues/14492"},{"reference_url":"https://github.com/matrix-org/synapse/pull/14642","reference_id":"14642","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-14T20:00:17Z/"}],"url":"https://github.com/matrix-org/synapse/pull/14642"},{"reference_url":"https://github.com/advisories/GHSA-f3wc-3vxv-xmvr","reference_id":"GHSA-f3wc-3vxv-xmvr","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-f3wc-3vxv-xmvr"},{"reference_url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-f3wc-3vxv-xmvr","reference_id":"GHSA-f3wc-3vxv-xmvr","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value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is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix Federation API allows remote homeservers to request the authorization events in a room. This is necessary so that a homeserver receiving some events can validate that those events are legitimate and permitted in their room. However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorization events does not sufficiently check that the requesting server should be able to access them. The issue was patched in Synapse 1.69.0. Homeserver administrators are advised to upgrade.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2022-39335","reference_id":"","reference_type":"","scores":[{"value":"0.00138","scoring_system":"epss","scoring_elements":"0.33519","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00138","scoring_system":"epss","scoring_elements":"0.33699","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-39335"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"7.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-65.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"7.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-65.yaml"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"7.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2022-39335","reference_id":"","reference_type":"","scores":[{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"7.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-39335"},{"reference_url":"https://github.com/matrix-org/synapse/issues/13288","reference_id":"13288","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"7.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-14T19:45:19Z/"}],"url":"https://github.com/matrix-org/synapse/issues/13288"},{"reference_url":"https://github.com/matrix-org/synapse/pull/13823","reference_id":"13823","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"7.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-14T19:45:19Z/"}],"url":"https://github.com/matrix-org/synapse/pull/13823"},{"reference_url":"https://github.com/advisories/GHSA-45cj-f97f-ggwv","reference_id":"GHSA-45cj-f97f-ggwv","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-45cj-f97f-ggwv"},{"reference_url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwv","reference_id":"GHSA-45cj-f97f-ggwv","reference_type":"","scores":[{"value":"5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"5.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"7.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","sc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is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled` configuration setting. 2. The local password database is enabled via the `password_config.enabled` and `password_config.localdb_enabled` configuration settings *and* a user's password is updated via an admin API after a user is deactivated. Note that the local password database is enabled by default, but it is uncommon to set a user's password after they've been deactivated. Installations that are configured to only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external password provider (e.g. LDAP) are not affected. If not using JSON Web Tokens, ensure that deactivated users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to upgrade.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-32682","reference_id":"","reference_type":"","scores":[{"value":"0.00956","scoring_system":"epss","scoring_elements":"0.76937","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00956","scoring_system":"epss","scoring_elements":"0.76866","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-32682"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/matrix-org/synapse/issues/12274","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/issues/12274"},{"reference_url":"https://github.com/matrix-org/synapse/releases/tag/v1.85.0","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/releases/tag/v1.85.0"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-84.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-84.yaml"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32682","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32682"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1037207","reference_id":"1037207","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1037207"},{"reference_url":"https://github.com/matrix-org/synapse/pull/15624","reference_id":"15624","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-07T16:28:39Z/"}],"url":"https://github.com/matrix-org/synapse/pull/15624"},{"reference_url":"https://github.com/matrix-org/synapse/pull/15634","reference_id":"15634","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-07T16:28:39Z/"}],"url":"https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mmary":"Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-37303","reference_id":"","reference_type":"","scores":[{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.57331","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.57213","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-37303"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2024-287.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2024-287.yaml"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-37303","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-37303"},{"reference_url":"https://github.com/matrix-org/matrix-spec-proposals/pull/3916","reference_id":"3916","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T18:49:29Z/"}],"url":"https://github.com/matrix-org/matrix-spec-proposals/pull/3916"},{"reference_url":"https://github.com/advisories/GHSA-gjgr-7834-rhxr","reference_id":"GHSA-gjgr-7834-rhxr","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-gjgr-7834-rhxr"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr","reference_id":"GHSA-gjgr-7834-rhxr","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T18:49:29Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/372289?format=json","purl":"pkg:pypi/matrix-synapse@1.106","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.106"},{"url":"http://public2.vulnerablecode.io/api/packages/86739?format=json","purl":"pkg:pypi/matrix-synapse@1.106.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1xwm-33sy-3qfv"},{"vulnerability":"VCID-3ngy-dt6j-tuef"},{"vulnerability":"VCID-hqwh-2un3-bqd8"},{"vulnerability":"VCID-n8mv-4upg-hfa3"},{"vulnerability":"VCID-rcdd-qkxt-nuez"},{"vulnerability":"VCID-s1jf-x5ug-jqcq"},{"vulnerability":"VCID-y6j7-eetd-pkfh"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.106.0"}],"aliases":["CVE-2024-37303","GHSA-gjgr-7834-rhxr","PYSEC-2024-287"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-c1vt-9j6a-b7cr"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/43400?format=json","vulnerability_id":"VCID-hqwh-2un3-bqd8","summary":"Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects such invalid invites received over federation and restores the ability to sync for affected users.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-52815","reference_id":"","reference_type":"","scores":[{"value":"0.00353","scoring_system":"epss","scoring_elements":"0.5808","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00353","scoring_system":"epss","scoring_elements":"0.58194","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-52815"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52815","reference_id":"","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52815"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088995","reference_id":"1088995","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088995"},{"reference_url":"https://github.com/advisories/GHSA-f3r3-h2mq-hx2h","reference_id":"GHSA-f3r3-h2mq-hx2h","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-f3r3-h2mq-hx2h"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2h","reference_id":"GHSA-f3r3-h2mq-hx2h","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T19:05:32Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2h"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/372296?format=json","purl":"pkg:pypi/matrix-synapse@1.120.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.120.1"}],"aliases":["CVE-2024-52815","GHSA-f3r3-h2mq-hx2h"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-hqwh-2un3-bqd8"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/70007?format=json","vulnerability_id":"VCID-n8mv-4upg-hfa3","summary":"Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-45078","reference_id":"","reference_type":"","scores":[{"value":"0.00014","scoring_system":"epss","scoring_elements":"0.02905","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00014","scoring_system":"epss","scoring_elements":"0.02895","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-45078"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"7.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://github.com/element-hq/synapse/commit/3f58bc50dfba5768ee43ce48c5e74c25ba0b078a","reference_id":"","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"7.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse/commit/3f58bc50dfba5768ee43ce48c5e74c25ba0b078a"},{"reference_url":"https://github.com/element-hq/synapse/issues/19394","reference_id":"","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"7.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse/issues/19394"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2026-191.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"7.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2026-191.yaml"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45078","reference_id":"","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"7.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45078"},{"reference_url":"https://github.com/advisories/GHSA-8q93-326v-3m7g","reference_id":"GHSA-8q93-326v-3m7g","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-8q93-326v-3m7g"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-8q93-326v-3m7g","reference_id":"GHSA-8q93-326v-3m7g","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"6.8","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"7.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-29T15:31:35Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-8q93-326v-3m7g"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/93940?format=json","purl":"pkg:pypi/matrix-synapse@1.152.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.152.1"}],"aliases":["CVE-2026-45078","CVE-2026-45078,","GHSA-8q93-326v-3m7g","PYSEC-2026-191"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-n8mv-4upg-hfa3"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/143114?format=json","vulnerability_id":"VCID-p9ck-pwqp-qyc7","summary":"Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-32683","reference_id":"","reference_type":"","scores":[{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.5793","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00349","scoring_system":"epss","scoring_elements":"0.57818","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-32683"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"3.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/matrix-org/synapse/releases/tag/v1.85.0","reference_id":"","reference_type":"","scores":[{"value":"3.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/releases/tag/v1.85.0"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-85.yaml","reference_id":"","reference_type":"","scores":[{"value":"3.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-85.yaml"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2","reference_id":"","reference_type":"","scores":[{"value":"3.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32683","reference_id":"","reference_type":"","scores":[{"value":"3.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32683"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1037207","reference_id":"1037207","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1037207"},{"reference_url":"https://github.com/matrix-org/synapse/pull/15601","reference_id":"15601","reference_type":"","scores":[{"value":"3.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-07T16:25:39Z/"}],"url":"https://github.com/matrix-org/synapse/pull/15601"},{"reference_url":"https://github.com/advisories/GHSA-98px-6486-j7qc","reference_id":"GHSA-98px-6486-j7qc","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-98px-6486-j7qc"},{"reference_url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc","reference_id":"GHSA-98px-6486-j7qc","reference_type":"","scores":[{"value":"3.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-01-07T16:25:39Z/"}],"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc"},{"reference_url":"https://usn.ub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is an open-source Matrix homeserver. In Synapse versions before 1.120.1, enabling the dynamic_thumbnails option or processing a specially crafted request could trigger the decoding and thumbnail generation of uncommon image formats, potentially invoking external tools like Ghostscript for processing. This significantly expands the attack surface in a historically vulnerable area, presenting a risk that far outweighs the benefit, particularly since these formats are rarely used on the open web or within the Matrix ecosystem. Synapse 1.120.1 addresses the issue by restricting thumbnail generation to images in the following widely used formats: PNG, JPEG, GIF, and WebP. This vulnerability is fixed in 1.120.1.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-53863","reference_id":"","reference_type":"","scores":[{"value":"0.00962","scoring_system":"epss","scoring_elements":"0.76926","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00962","scoring_system":"epss","scoring_elements":"0.76998","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-53863"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53863","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53863"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088995","reference_id":"1088995","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088995"},{"reference_url":"https://github.com/advisories/GHSA-vp6v-whfm-rv3g","reference_id":"GHSA-vp6v-whfm-rv3g","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-vp6v-whfm-rv3g"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-vp6v-whfm-rv3g","reference_id":"GHSA-vp6v-whfm-rv3g","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T19:07:32Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-vp6v-whfm-rv3g"},{"reference_url":"https://usn.ubuntu.com/7444-1/","reference_id":"USN-7444-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/7444-1/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/372296?format=json","purl":"pkg:pypi/matrix-synapse@1.120.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.120.1"}],"aliases":["CVE-2024-53863","GHSA-vp6v-whfm-rv3g"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-rcdd-qkxt-nuez"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/43596?format=json","vulnerability_id":"VCID-s1jf-x5ug-jqcq","summary":"Synapse is an open-source Matrix homeserver. In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. Synapse 1.120.1 resolves the issue by denying requests with unsupported multipart/form-data content type.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-52805","reference_id":"","reference_type":"","scores":[{"value":"0.01089","scoring_system":"epss","scoring_elements":"0.7834","published_at":"2026-06-11T12:55:00Z"},{"value":"0.01089","scoring_system":"epss","scoring_elements":"0.78408","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-52805"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52805","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52805"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088995","reference_id":"1088995","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088995"},{"reference_url":"https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518","reference_id":"4688#issuecomment-1167705518","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T19:04:05Z/"}],"url":"https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518"},{"reference_url":"https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609","reference_id":"4688#issuecomment-2385711609","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T19:04:05Z/"}],"url":"https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609"},{"reference_url":"https://github.com/advisories/GHSA-rfq8-j7rh-8hf2","reference_id":"GHSA-rfq8-j7rh-8hf2","reference_type":"","scores":[],"url":"https://github.com/advisories/GHSA-rfq8-j7rh-8hf2"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2","reference_id":"GHSA-rfq8-j7rh-8hf2","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-12-03T19:04:05Z/"}],"url":"https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/372296?format=json","purl":"pkg:pypi/matrix-synapse@1.120.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.120.1"}],"aliases":["CVE-2024-52805","GHSA-rfq8-j7rh-8hf2"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-s1jf-x5ug-jqcq"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/127905?format=json","vulnerability_id":"VCID-y6j7-eetd-pkfh","summary":"Synapse is an open source Matrix homeserver implementation. Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. The issue is patched in Synapse 1.138.3, 1.138.4, 1.139.1, and 1.139.2. Note that even though 1.138.3 and 1.139.1 fix the vulnerability, they inadvertently introduced an unrelated regression. For this reason, the maintainers of Synapse recommend skipping these releases and upgrading straight to 1.138.4 and 1.139.2.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-61672.json","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-61672.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-61672","reference_id":"","reference_type":"","scores":[{"value":"0.00046","scoring_system":"epss","scoring_elements":"0.14801","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00046","scoring_system":"epss","scoring_elements":"0.14679","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-61672"},{"reference_url":"https://github.com/element-hq/synapse","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse"},{"reference_url":"https://github.com/element-hq/synapse/releases/tag/v1.138.4","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse/releases/tag/v1.138.4"},{"reference_url":"https://github.com/element-hq/synapse/releases/tag/v1.139.2","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/element-hq/synapse/releases/tag/v1.139.2"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1117854","reference_id":"1117854","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1117854"},{"reference_url":"https://github.com/element-hq/synapse/pull/17097","reference_id":"17097","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-10-15T16:10:58Z/"}],"url":"https://github.com/element-hq/synapse/pull/17097"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2402525","reference_id":"2402525","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2402525"},{"reference_url":"https://github.com/element-hq/synapse/commit/26aaaf9e48fff80cf67a20c691c75d670034b3c1","reference_id":"26aaaf9e48fff80cf67a20c691c75d670034b3c1","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-10-15T16:10:58Z/"}],"url":"https://github.com/element-hq/synapse/commit/26aaaf9e48fff80cf67a20c691c75d670034b3c1"},{"reference_url":"https://github.com/element-hq/synapse/commit/7069636c2d6d1ef2022287addf3ed8b919ef2740","reference_id":"7069636c2d6d1ef2022287addf3ed8b919ef2740","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-10-15T16:10:58Z/"}],"url":"https://github.com/element-hq/synapse/commit/7069636c2d6d1ef2022287addf3ed8b919ef2740"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-61672","reference_id":"CVE-2025-61672","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-61672"},{"reference_url":"https://github.com/advisories/GHSA-fh66-fcv5-jjfr","reference_id":"GHSA-fh66-fcv5-jjfr","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-fh66-fcv5-jjfr"},{"reference_url":"https://github.com/element-hq/synapse/security/advisories/GHSA-fh66-fcv5-jjfr","reference_id":"GHSA-fh66-fcv5-jjfr","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"5.3","scoring_system":"cvssv4","scoring_e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vulnerabilites have been found in Synapse, the worst of which could result in information 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vulnerabilites have been found in Synapse, the worst of which could result in information leaks.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-43796","reference_id":"","reference_type":"","scores":[{"value":"0.00233","scoring_system":"epss","scoring_elements":"0.46455","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00233","scoring_system":"epss","scoring_elements":"0.46309","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-43796"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f"},{"reference_url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-230.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-230.yaml"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-43796","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-43796"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1055255","reference_id":"1055255","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1055255"},{"reference_url":"https://github.com/advisories/GHSA-mp92-3jfm-3575","reference_id":"GHSA-mp92-3jfm-3575","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-mp92-3jfm-3575"},{"reference_url":"https://usn.ubuntu.com/7444-1/","reference_id":"USN-7444-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/7444-1/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/80687?format=json","purl":"pkg:pypi/matrix-synapse@1.95.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1xwm-33sy-3qfv"},{"vulnerability":"VCID-2ctw-4fy5-4ufd"},{"vulnerability":"VCID-3ngy-dt6j-tuef"},{"vulnerability":"VCID-7v7h-zrjj-pkh3"},{"vulnerability":"VCID-c1vt-9j6a-b7cr"},{"vulnerability":"VCID-hqwh-2un3-bqd8"},{"vulnerability":"VCID-n8mv-4upg-hfa3"},{"vulnerability":"VCID-rcdd-qkxt-nuez"},{"vulnerability":"VCID-s1jf-x5ug-jqcq"},{"vulnerability":"VCID-y6j7-eetd-pkfh"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/matrix-synapse@1.95.1"}],"aliases":["CVE-2023-43796","GHSA-mp92-3jfm-3575","PYSEC-2023-230"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-z6uu-5bdh-pud4"}],"fixing_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/167250?format=json","vulnerability_id":"VCID-27ht-47d2-77f6","summary":"Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2022-31152","reference_id":"","reference_type":"","scores":[{"value":"0.00731","scoring_system":"epss","scoring_elements":"0.73228","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00731","scoring_system":"epss","scoring_elements":"0.73151","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-31152"},{"reference_url":"https://github.com/matrix-org/synapse","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse"},{"reference_url":"https://github.com/matrix-org/synapse/commit/d4b1c0d800eaa83c4d56a9cf17881ad362b9194b","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/commit/d4b1c0d800eaa83c4d56a9cf17881ad362b9194b"},{"reference_url":"https://github.com/matrix-org/synapse/commit/e16ea87d0f8c4c30cad36f85488eb1f647e640b0","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/matrix-org/synapse/commit/e16ea87d0f8c4c30cad36f85488eb1f647e640b0"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2022-262.yaml","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2022-262.yaml"},{"reference_url":"https://github.com/matrix-org/synapse/pull/13087","reference_id":"13087","reference_type":"","scores":[{"value":"6.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H"},{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:01:29Z/"}],"url":"https://github.com/matrix-org/synapse/pull/13087"},{"reference_url":"https://github.com/matrix-org/synapse/pull/13088","reference_id":"13088","reference_type":"","scores":[{"value":"6.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H"},{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:01:29Z/"}],"url":"https://github.com/matrix-org/synapse/pull/13088"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31152","reference_id":"CVE-2022-31152","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31152"},{"reference_url":"https://github.com/advisories/GHSA-jhjh-776m-4765","reference_id":"GHSA-jhjh-776m-4765","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-jhjh-776m-4765"},{"reference_url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765","reference_id":"GHSA-jhjh-776m-4765","reference_type":"","scores":[{"value":"6.4","scoring_system":"cvssv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