CVE-2026-100677 stoatchat before 0.15.5 Account Enumeration via Error Location
Unauthenticated attackers can enumerate registered users by analyzing error location fields in login responses, exposing user account existence.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100677?
CVE-2026-100677 is a medium-severity vulnerability in stoatchat, published on 26 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-209
Which versions are affected by CVE-2026-100677?
How do I fix CVE-2026-100677?
No fix has been published for CVE-2026-100677 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-100677 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100677 exists.
Sources
Also known as GHSA-h44h-xx2j-hp56, GHSA-v7jg-f6q5-rwc7.