{"id":"CVE-2026-45056","revision":"b53b9da1eac74fe9b93af9974c650ea5","records":[{"revision":"b53b9da1eac74fe9b93af9974c650ea5","observedAt":"2026-10-25T10:17:33.838+00:00","statement":{"source":"nvd","id":"CVE-2026-45056","aliases":[],"title":"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 us…","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":"2026-09-11T22:16:37.263+00:00","modifiedAt":"2026-09-30T19:57:08.043+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":6.9,"severity":"MEDIUM"}],"references":["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://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-wfq4-36m3-9g42","https://rustsec.org/advisories/RUSTSEC-2026-0159.html"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45056","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-290"],"productCriteria":[],"sourceDates":{"published":"2026-09-11T22:16:37.263","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-2026-45056","identifiers":["CVE-2026-45056"]},"retained":false,"historicalAffected":[]}],"coverage":[]}