Netgate pfSense CE through 2.9.0 Authorization Bypass via config_restore() and config_install()

{
  "id": "62f569a3b9e198509f5fd5ccd7e282f3dfc26e6e6f9ea09421c7a22a34371e86",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-111231",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Netgate pfSense CE through 2.9.0 Authorization Bypass via config_restore() and config_install()",
    "summary": "Netgate pfSense CE through 2.9.0 contains an authorization bypass vulnerability that allows read-only WebGUI users to replace config.xml because config_restore() and config_install() ignore the 'User - Config: Deny Config Write' privilege. Attackers holding page privileges for services_acb.php, uploadconfig.php, diag_confbak.php, or diag_backup.php can install a chosen config.xml to gain root-level code execution after reload or reboot.",
    "evidence": "cve:CVE-2026-111231",
    "products": [
      {
        "name": {
          "value": "pfSense CE",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-111231",
      "aliases": [
        "CVE-2026-111231"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 8.6,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "HIGH",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 7.2,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "confidentialityImpact": "HIGH"
          }
        }
      ],
      "affected": [
        {
          "repo": "https://github.com/pfsense/pfsense",
          "vendor": "Netgate",
          "product": "pfSense CE",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "2.9.0"
            }
          ],
          "packageURL": "pkg:github/pfsense/pfsense",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T15:06:23.532Z",
      "provider": "cve",
      "references": [
        "https://github.com/abraxas/pfsense-config-readonly-restore",
        "https://abraxaslabs.tech/research/pfsense-ce-leftovers",
        "https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/config.lib.inc#L743-L798",
        "https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/config.lib.inc#L588-L597",
        "https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-authorization-bypass-via-config-restore-and-config-install"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-111231",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T15:06:13.987919Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-26T15:06:23.532Z"
            }
          }
        ],
        "cna": {
          "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-15T18:46:31.461Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111231",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 314028,
  "published_at": "2026-10-15T18:46:31.461+00:00"
}