UTMStack < 11.2.16 Authentication Bypass via InternalApiKeyFilter

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-82042",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-10-02T20:15:27.035Z",
    "dateReserved": "2026-08-27T21:39:20.461Z",
    "datePublished": "2026-10-02T20:15:27.035Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-10-02T20:15:27.035Z"
      },
      "datePublic": "2026-08-31T00:00:00.000Z",
      "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."
        }
      ],
      "affected": [
        {
          "vendor": "UTMStack",
          "product": "UTMStack",
          "repo": "https://github.com/utmstack/UTMStack",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "11.2.16"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Missing Authentication for Critical Function",
              "cweId": "CWE-306",
              "type": "CWE"
            }
          ]
        }
      ],
      "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"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ],
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Adam Nurudini (QwesiRED)",
          "type": "finder"
        },
        {
          "lang": "en",
          "value": "VulnCheck",
          "type": "coordinator"
        }
      ],
      "tags": [
        "x_open-source"
      ]
    }
  }
}