{"id":"CVE-2026-82042","title":"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 valu…","summary":"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 valu…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-306"],"vendor":"UTMStack","product":"UTMStack","affected":["UTMStack < 11.2.16"],"published":"2026-10-02","updated":"2026-10-02","sourceUpdated":"2026-10-02T21:16:56.643","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82042","references":[{"url":"https://github.com/UTMStack/UTMStack/releases/tag/v11.2.16","label":"disclosure@vulncheck.com"},{"url":"https://github.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecdd","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/utmstack-authentication-bypass-via-internalapikeyfilter","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-02T22:33:09.847Z","slug":"CVE-2026-82042","body":"## Overview\n\nUTMStack 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}