{"id":"EUVD-2026-76764","revision":"87e51b24ccdf45e0ac2564a969994df1","records":[{"revision":"87e51b24ccdf45e0ac2564a969994df1","observedAt":"2026-11-01T10:23:51.541+00:00","statement":{"source":"euvd","id":"EUVD-2026-76764","aliases":["CVE-2026-45057","GHSA-h97m-27fx-42rx"],"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":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","score":4.9,"severity":null}],"references":["https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx","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://rustsec.org/advisories/RUSTSEC-2026-0158.html"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-76764","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 11, 2026, 9:12:17 PM","dateUpdated":"Sep 14, 2026, 4:18:19 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-76764","identifiers":["EUVD-2026-76764","CVE-2026-45057","GHSA-h97m-27fx-42rx"]},"retained":false,"historicalAffected":[]}],"coverage":[]}