CVE-2025-66622 - matrix-sdk-base is vulnerable to DoS via custom m.room.join_rules event values

CVE ID : CVE-2025-66622 Published : Dec. 9, 2025, 2:07 a.m. | 2 hours, 10 minutes ago 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. Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...

Source: Telegram CVE Monitor