{"id":"CVE-2026-45057","revision":"ed39663fdf934b01943097758139e6c8","records":[{"revision":"ed39663fdf934b01943097758139e6c8","observedAt":"2026-10-25T10:17:33.838+00:00","statement":{"source":"nvd","id":"CVE-2026-45057","aliases":[],"title":"matrix-sdk-ui provides GUI-centric utilities on top of matrix-rust-sdk. The message edit validation logic in the  `matrix-sdk-ui` crate prior to 0.17.0 is missing a check: when replacing an encrypted event, the replacement event itself is n…","description":"matrix-sdk-ui provides GUI-centric utilities on top of matrix-rust-sdk. The message edit validation logic in the  `matrix-sdk-ui` crate prior to 0.17.0 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrators (or actors with equivalent power) to impersonate or spoof messages as if they were sent by a victim user. `matrix-sdk-ui` 0.17.0 fixes the message edit validation logic to align with the algorithm for replacement events[^1] described in the Matrix specification. No known workarounds are available.","state":0,"publishedAt":"2026-09-11T21:17:09.517+00:00","modifiedAt":"2026-09-30T19:57:08.043+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","score":4.9,"severity":"MEDIUM"}],"references":["https://github.com/matrix-org/matrix-rust-sdk/pull/6454","https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1","https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx","https://rustsec.org/advisories/RUSTSEC-2026-0158.html"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45057","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-345"],"productCriteria":[],"sourceDates":{"published":"2026-09-11T21:17:09.517","lastModified":"2026-09-30T19:57:08.043"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-45057","identifiers":["CVE-2026-45057"]},"retained":false,"historicalAffected":[]}],"coverage":[]}