{"url":"http://public2.vulnerablecode.io/api/packages/93859?format=json","purl":"pkg:pypi/matrix-synapse@1.121.1","type":"pypi","namespace":"","name":"matrix-synapse","version":"1.121.1","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"1.152.1","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"}],"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/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":"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":2.3,"exploitability":"0.5","weighted_severity":"4.6","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-1xwm-33sy-3qfv"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/90078?format=json","vulnerability_id":"VCID-3ngy-dt6j-tuef","summary":"Synapse 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"}],"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":null,"exploitability":null,"weighted_severity":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-3ngy-dt6j-tuef"},{"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":"0.02895","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/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":"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":3.0,"exploitability":"0.5","weighted_severity":"6.1","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-n8mv-4upg-hfa3"},{"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":"0.14679","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_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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