{"id":"CVE-2024-40648","aliases":["GHSA-4qg4-cvh2-crgg","RUSTSEC-2024-0356"],"url":"https://o3.security/vulnerability/CVE-2024-40648","summary":"`UserIdentity::is_verified` not checking verification status of own user identity while performing the check in matrix-rust-sdk","details":"matrix-rust-sdk is an implementation of a Matrix client-server library in Rust. The `UserIdentity::is_verified()` method in the matrix-sdk-crypto crate before version 0.7.2 doesn't take into account the verification status of the user's own identity while performing the check and may as a result return a value contrary to what is implied by its name and documentation. If the method is used to decide whether to perform sensitive operations towards a user identity, a malicious homeserver could manipulate the outcome in order to make the identity appear trusted. This is not a typical usage of the method, which lowers the impact. The method itself is not used inside the `matrix-sdk-crypto` crate. The 0.7.2 release of the `matrix-sdk-crypto` crate includes a fix. All users are advised to upgrade. There are no known workarounds for this vulnerability.","published":"2024-07-18T16:45:56.321Z","modified":"2026-07-15T01:49:08.468732485Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.0028,"percentile":0.2023,"asOf":"2026-07-31"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"matrix-sdk-crypto","fixedVersion":"0.7.2"}],"fix":{"url":"https://github.com/matrix-org/matrix-rust-sdk/commit/76a7052149bb8f722df12da915b3a06d19a6695a","label":"matrix-org/matrix-rust-sdk@76a7052"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40648.json"},{"type":"ADVISORY","url":"https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-4qg4-cvh2-crgg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-40648"},{"type":"FIX","url":"https://github.com/matrix-org/matrix-rust-sdk/commit/76a7052149bb8f722df12da915b3a06d19a6695a"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:08.468732485Z"}}