{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45057", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-08T18:07:27.342Z", "datePublished": "2026-09-11T21:12:17.797Z", "dateUpdated": "2026-09-11T21:12:17.797Z"}, "containers": {"cna": {"title": "matrix-sdk-ui: Incomplete edit validation", "problemTypes": [{"descriptions": [{"cweId": "CWE-345", "lang": "en", "description": "CWE-345: Insufficient Verification of Data Authenticity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx"}, {"name": "https://github.com/matrix-org/matrix-rust-sdk/pull/6454", "tags": ["x_refsource_MISC"], "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/6454"}, {"name": "https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1"}, {"name": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html", "tags": ["x_refsource_MISC"], "url": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html"}], "affected": [{"vendor": "matrix-org", "product": "matrix-sdk-ui", "versions": [{"version": "< 0.16.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-11T21:12:17.797Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-h97m-27fx-42rx", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "matrix-sdk-ui", "vendor": "matrix-org", "versions": [{"status": "affected", "version": "< 0.16.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-45057", "lastModified": "2026-09-11T21:17:09.517", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-11T21:17:09.517", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/6454"}, {"source": "security-advisories@github.com", "url": "https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx"}, {"source": "security-advisories@github.com", "url": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-09-12T06:15:04.245236+00:00", "updated": "2026-09-12T12:30:14.591678+00:00", "vendors": []}