CVE-2025-53940

Publication date

2025-07-24 22:23:58

Family

GitHub_M

State

PUBLISHED

Description

Quiet is an alternative to team chat apps like Slack, Discord, and Element that does not require trusting a central server or running ones own. In versions 6.1.0-alpha.4 and below, Quiets API for backend/frontend communication was using an insecure, not constant-time comparison function for token verification. This allowed for a potential timing attack where an attacker would try different token values and observe tiny differences in the response time (wrong characters fail faster) to guess the whole token one character at a time. This is fixed in version 6.0.1.