{"id":"CVE-2026-45056","revision":"01ff7c5039ec4beb82cc7a3fef6c0890","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. There are no known workarounds for the issue.","state":0,"publishedAt":"2026-09-11T21:13:56.332+00:00","modifiedAt":"2026-09-14T18:17:31.91+00:00","affected":[{"ecosystem":"Vendor product","name":"matrix-rust-sdk","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"matrix-org\",\n                    \"product\": \"matrix-rust-sdk\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.12.0, < 0.16.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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":6.9,"severity":"MEDIUM"}],"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/releases/tag/matrix-sdk-0.16.1","https://rustsec.org/advisories/RUSTSEC-2026-0159.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45056","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-45056","identifiers":["CVE-2026-45056"]},"retained":false,"historicalAffected":[]}],"coverage":[]}