CVE-2025-66622
Severity CVSS v4.0:
LOW
Type:
Unavailable / Other
Publication date:
09/12/2025
Last modified:
09/12/2025
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.