CVE-2026-100677

MEDIUM 5.3

stoatchat before 0.15.5 Account Enumeration via Error Location

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-209
Vendor	stoatchat
Product	stoatchat
Published	Sep 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

stoatchat / stoatchat

0 < 0.15.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/stoatchat/stoatchat/security/advisories/GHSA-h44h-xx2j-hp56 vulncheck.com: https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-account-enumeration-via-error-location

Credits

🔍 QuentinRa