CVE-2026-100677CWE-209

CVE-2026-100677

Medium · published September 26, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
16.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00261 · 16.9th percentile
Weakness
CWE-209 · Generation of Error Message Containing Sensitive Information
Published
2026-09-26T18:16Z
References (3)
https://github.com/stoatchat/stoatchat/security/advisories/GHSA-h44h-xx2j-hp56 · [email protected]https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-account-enumeration-via-error-location · [email protected]https://github.com/stoatchat/stoatchat/security/advisories/GHSA-h44h-xx2j-hp56 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 28 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 26 SEP 13:23Z
    stoatchat before 0.15.5 Account Enumeration via Error Location
    cvelistv5