CVE-2026-100677

stoatchat before 0.15.5 Account Enumeration via Error Location

MEDIUM
5.3
CVSS Score
Published: September 26, 2026 at 01:23 PM UTC
Updated: September 30, 2026 at 06:18 PM UTC
1 product affected across 1 vendorStoatchat

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.15.5
Vendor states this is fixed in 0.15.5 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-209

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