Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck
CVE-2026-100677stoatchat before 0.15.5 Account Enumeration via Error Location
Medium 5.3
In plain English
A medium-severity security flaw in stoatchat from stoatchat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 72.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
Weakness: CWE-209 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-h44h-xx2j-hp56) vendor-advisory
- VulnCheck Advisory: stoatchat before 0.15.5 Account Enumeration via Error Location third-party-advisory