{"url":"http://public2.vulnerablecode.io/api/packages/70764?format=json","purl":"pkg:pypi/matrix-synapse@1.139.1","type":"pypi","namespace":"","name":"matrix-synapse","version":"1.139.1","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/91997?format=json","vulnerability_id":"VCID-44n9-z1mc-fydq","summary":"Synapse pagination Denial of Service\n### Impact\n\nIn federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse from providing full history to paginating clients.\n\nClients could therefore fail to display room history.\n\n### Patches\n\nUpdate to Synapse 1.152.1 or later.\n\n### Workarounds\n\nThere are no known workarounds for this issue.\n\n### Identifiers\n\n- ELEMENTSEC-2025-1636\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).","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":"0.25833","published_at":"2026-06-05T12:55:00Z"},{"value":"0.00091","scoring_system":"epss","scoring_elements":"0.25777","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00091","scoring_system":"epss","scoring_elements":"0.25824","published_at":"2026-06-06T12:55:00Z"}],"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/element-hq/synapse/security/advisories/GHSA-6qf2-7x63-mm6v","reference_id":"","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"},{"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"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/75426?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-44n9-z1mc-fydq"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/51318?format=json","vulnerability_id":"VCID-57xv-u1be-mfez","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":"0.02963","published_at":"2026-06-05T12:55:00Z"},{"value":"0.00014","scoring_system":"epss","scoring_elements":"0.02917","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00014","scoring_system":"epss","scoring_elements":"0.02971","published_at":"2026-06-06T12:55:00Z"}],"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":"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":"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":"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/element-hq/synapse/security/advisories/GHSA-8q93-326v-3m7g","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":"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"},{"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"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/75426?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-57xv-u1be-mfez"}],"fixing_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/47964?format=json","vulnerability_id":"VCID-361n-7ar1-fqgr","summary":"Synapse's invalid device keys degrade federation functionality\nLack 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.","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":"0.1464","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00046","scoring_system":"epss","scoring_elements":"0.14676","published_at":"2026-06-05T12:55:00Z"},{"value":"0.00046","scoring_system":"epss","scoring_elements":"0.14682","published_at":"2026-06-06T12:55:00Z"}],"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/commit/26aaaf9e48fff80cf67a20c691c75d670034b3c1","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":""},{"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":"","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://github.com/element-hq/synapse/pull/17097","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":""},{"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://github.com/element-hq/synapse/releases/tag/v1.138.3","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":""},{"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/releases/tag/v1.138.3"},{"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/v1.139.1","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":""},{"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/releases/tag/v1.139.1"},{"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://bugzilla.redhat.com/show_bug.cgi?id=24025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