{"id":"CVE-2025-49090","details":"The Matrix specification before 1.16 (i.e., with a room version before 12 and State Resolution before 2.1) has deficient state resolution.","modified":"2026-08-12T03:51:29.783273230Z","published":"2025-10-02T00:00:00Z","related":["openSUSE-SU-2025:15436-1"],"database_specific":{"cwe_ids":["CWE-642"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49090.json","cna_assigner":"mitre"},"references":[{"type":"WEB","url":"https://github.com/matrix-org/matrix-spec/releases/tag/v1.16"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49090.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49090"},{"type":"REPORT","url":"https://github.com/Nheko-Reborn/nheko/issues/1931"},{"type":"ARTICLE","url":"https://matrix.org/blog/2025/08/project-hydra-improving-state-res/"},{"type":"ARTICLE","url":"https://matrix.org/blog/2025/08/security-release/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/matrix-org/matrix-spec","events":[{"introduced":"0"},{"fixed":"81a864545f7d948a881f5227700e5312c64f506e"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"1.16"}]}}],"versions":["v1.15","v1.14","v1.13","v1.12","v1.11","v1.10","v1.9","v1.8","v1.7","v1.6","v1.5","v1.2","push_gateway/r0.1.0","client-server/0.3.0","client-server/r0.1.0","r0.0.1","r0.0.0","0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-49090.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L"}]}