[ CVE-2026-82042 · Published 2 Oct 2026 ]
Vulnerability in UTMStack
CVSS 9.8
EPSS <1%No fix listed yet
[ Why it matters ]Priority signals
- Critical severity: CVSS 9.8
[ Description ]Official description
UTMStack before 11.2.16 contains an authentication bypass vulnerability that allows remote attackers to gain full administrative API access by presenting a valid Utm-Internal-Key header matching the INTERNAL_KEY environment variable value, which the InternalApiKeyFilter accepts for any endpoint without path restriction, constant-time comparison, rate limiting, or audit logging. Attackers who obtain the key value can authenticate without a user account or JWT to create accounts, manage users, exfiltrate data, and modify security rules.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.