CVE-2026-100678

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductStoatchat

PublishedSep 26, 2026

First seenSep 26, 2026

Weakness typeCWE-307CWE-307

How to fix

Update

stoatchat stoatchat0.15.5 or later

Vendor advisories

github.com/stoatchat/stoatchat/security/advisories/GHSA-6877-g673-f5r8

Affected products

Product	Affected versions	Fixed in
stoatchat stoatchat	v < 0.15.5	0.15.5

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