{"id":"CVE-2025-66622","revision":"4cd4afd05a3940d7af69e0a9175d45fe","records":[{"revision":"4cd4afd05a3940d7af69e0a9175d45fe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-66622","aliases":[],"title":"matrix-sdk-base is vulnerable to DoS via custom m.room.join_rules event values","description":"matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug. This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0.","state":0,"publishedAt":"2025-12-09T02:07:18.831+00:00","modifiedAt":"2025-12-09T16:02:47.455+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\": \"< 0.16.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U","score":1.3,"severity":"LOW"}],"references":["https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3","https://github.com/matrix-org/matrix-rust-sdk/pull/5924","https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0","https://rustsec.org/advisories/RUSTSEC-2025-0135.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-66622","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-66622","identifiers":["CVE-2025-66622"]},"retained":false,"historicalAffected":[]}],"coverage":[]}