Is CVE-2026-100677 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-100677?

CVE-2026-100677 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-100677

Description

stoatchat before 0.15.5 contains an account enumeration vulnerability in the login endpoint that exposes source file locations in error responses. Unauthenticated attackers can distinguish between registered and unregistered email addresses by comparing error location fields returned from POST /api/auth/session/login requests.