{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82042","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-08-27T21:39:20.461Z","datePublished":"2026-10-02T20:15:27.035Z","dateUpdated":"2026-10-02T20:15:27.035Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-02T20:15:27.035Z"},"title":"UTMStack < 11.2.16 Authentication Bypass via InternalApiKeyFilter","descriptions":[{"lang":"en","value":"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."}],"tags":["x_open-source"],"datePublic":"2026-08-31T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-306","description":"Missing Authentication for Critical Function","type":"CWE"}]}],"affected":[{"defaultStatus":"unaffected","vendor":"UTMStack","product":"UTMStack","packageURL":"pkg:github/utmstack/UTMStack","repo":"https://github.com/utmstack/UTMStack","versions":[{"status":"affected","version":"0","versionType":"semver","lessThan":"11.2.16"}]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9.3,"vectorString":"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"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","version":"3.1","baseSeverity":"CRITICAL","baseScore":9.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}}],"references":[{"url":"https://github.com/UTMStack/UTMStack/releases/tag/v11.2.16","name":"Release Notes","tags":["release-notes"]},{"url":"https://github.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecdd","name":"Patch Commit","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/utmstack-authentication-bypass-via-internalapikeyfilter","tags":["third-party-advisory"]}],"credits":[{"lang":"en","value":"Adam Nurudini (QwesiRED)","type":"finder"},{"lang":"en","value":"VulnCheck","type":"coordinator"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"vulncheck"}}}}