CVE-2026-100678
8.3
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Summary
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 addresses to bypass rate limiting and gain account access.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| stoatchat | stoatchat | 0 < 0.15.5 | affected |
| stoatchat | stoatchat | 0.15.5 | unaffected |
Weaknesses
- CWE-307: Improper Restriction of Excessive Authentication Attempts
References
- https://github.com/stoatchat/stoatchat/security/advisories/GHSA-6877-g673-f5r8
- https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-mfa-brute-force-via-insufficient-rate-limiting
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