{"id":"RUSTSEC-2026-0159","revision":null,"records":[{"revision":"01ff7c5039ec4beb82cc7a3fef6c0890","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-45056","aliases":[],"title":"Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution","description":"matrix-sdk-crypto is a no-network-IO implementation of a state machine that handles end-to-end encryption for Matrix clients. Starting in version 0.12.0 and prior to version 0.17.0, the matrix-sdk-crypto crate was missing a check for the user ID when decrypting an Olm-encrypted event containing the `sender_device_keys` property. This could be exploited to forge an encrypted to-device event, but only if the attacker colludes with the homeserver operator. This issue is fixed in matrix-sdk-crypto 0.17.0. 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Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-45056","identifiers":["CVE-2026-45056"]},"retained":false,"historicalAffected":[]},{"revision":"5e6e8dff71284fc1ab56975284b8c42f","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-wfq4-36m3-9g42","aliases":["CVE-2026-45056","RUSTSEC-2026-0159"],"title":"Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution","description":"### Impact\n\nThe `matrix-sdk-crypto` crate before 0.16.1 is missing a check for the sender's user ID when decrypting an Olm-encrypted to-device message containing the `sender_device_keys` property.\n\nThis could be exploited to spoof the sender of an encrypted to-device message, but only if the attacker colludes with (or is) the homeserver operator.\n\n### Patches\n\nThis issue is fixed in `matrix-sdk-crypto` 0.16.1.\n\n### Workarounds\n\nThere are no known workarounds for the issue.\n\n### References\n\nThis issue was fixed in https://github.com/matrix-org/matrix-rust-sdk/pull/6553.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email us at [security at matrix.org](mailto:security@matrix.org).","state":0,"publishedAt":"2026-06-04T14:47:05+00:00","modifiedAt":"2026-06-04T15:00:08.0921725+00:00","affected":[{"ecosystem":"crates.io","name":"matrix-sdk-crypto","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.12.0"},{"kind":"fixed","version":"0.16.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-wfq4-36m3-9g42","https://github.com/matrix-org/matrix-rust-sdk/pull/6553","https://github.com/matrix-org/matrix-rust-sdk","https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1","https://rustsec.org/advisories/RUSTSEC-2026-0159.html"],"sourceUrl":"https://github.com/advisories/GHSA-wfq4-36m3-9g42","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-wfq4-36m3-9g42","identifiers":["GHSA-wfq4-36m3-9g42","CVE-2026-45056","RUSTSEC-2026-0159"]},"retained":false,"historicalAffected":[]},{"revision":"c6b4ba88c0f1473a8231743ed3eb5d02","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"RUSTSEC-2026-0159","aliases":["CVE-2026-45056","GHSA-wfq4-36m3-9g42"],"title":"Sender-binding gaps in to-device messages","description":"The matrix-sdk-crypto crate before 0.16.1 is missing a check for the sender's\nuser ID when decrypting an Olm-encrypted to-device message containing the\nsender_device_keys property.\n\nThis could be exploited to spoof the sender of an encrypted to-device message,\nbut only if the attacker colludes with (or is) the homeserver operator.","state":0,"publishedAt":"2026-06-03T12:00:00+00:00","modifiedAt":"2026-10-12T18:00:09.2401035+00:00","affected":[{"ecosystem":"crates.io","name":"matrix-sdk-crypto","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.12.0"},{"kind":"fixed","version":"0.16.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://crates.io/crates/matrix-sdk-crypto","https://rustsec.org/advisories/RUSTSEC-2026-0159.html","https://github.com/matrix-org/matrix-rust-sdk/pull/6553"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0159","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2026-0159","identifiers":["RUSTSEC-2026-0159","CVE-2026-45056","GHSA-wfq4-36m3-9g42"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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