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.
History

Mon, 05 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 04 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Utmstack
Utmstack utmstack
Vendors & Products Utmstack
Utmstack utmstack

Fri, 02 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
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.
Title UTMStack < 11.2.16 Authentication Bypass via InternalApiKeyFilter
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-02T20:15:27.035Z

Updated: 2026-10-05T14:51:54.025Z

Reserved: 2026-08-27T21:39:20.461Z

Link: CVE-2026-82042

cve-icon Vulnrichment

Updated: 2026-10-05T14:51:50.473Z

cve-icon NVD

Status : Deferred

Published: 2026-10-02T21:16:56.643

Modified: 2026-10-06T15:25:00.650

Link: CVE-2026-82042

cve-icon Redhat

No data.