CVE-2026-100679: Stoatchat

High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days.

stoatchat before 0.15.5 fails to validate that MFA tickets belong to the authenticated user, allowing attackers to bypass MFA by using their own valid ticket with another user's session token. Attackers can obtain a ticket from their own account and use it with a victim's session token to disable TOTP, view recovery codes, or perform other sensitive operations without providing the victim's credentials.

Affected products

• Stoatchat Stoatchat: before 0.15.5 (fixed in 0.15.5)

Published 2026-09-26. Last modified 2026-09-28.