CVE-2026-100678

Versions of stoatchat prior to 0.15.5 are vulnerable to MFA brute-forcing because they fail to enforce account-level attempt limits on MFA login challenges. While IP-based rate limiting is present, attackers who already possess a valid password can bypass these restrictions by reusing MFA challen...

CVE-2026-100678: Improper Restriction of Excessive Authentication Attempts

stoatchat before 0.15.5 fails to enforce account-level attempt limits on MFA login challenges, allowing attackers who know a password to guess TOTP codes with only IP-based rate limiting. Attackers can reuse MFA challenge tickets across multiple failed attempts and distribute guesses across IP...