CVE-2025-66622

Publication date

2025-12-09 02:07:18

Family

GitHub_M

State

PUBLISHED

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 crates sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0.