OPNsense: RCE on user managment

{
  "id": "32fc1af3f3aef6d3fe9876032d5fdb34fd72f30d8ee910a44102ae29d38dabe0",
  "url": "https://osv.dev/vulnerability/CVE-2026-44194",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OPNsense: RCE on user managment",
    "summary": "OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE) vulnerability in the OPNsense core allows a user with user-management privileges to execute arbitrary system commands as root. An attacker can bypass input validation by formatting their malicious payload as a compliant email address, allowing shell commands to reach the underlying operating system. The flaw exists in the local user synchronization flow, within core/src/opnsense/scripts/auth/sync_user.php. This vulnerability is fixed in 26.1.8.",
    "evidence": "osv:CVE-2026-44194",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-44194",
      "aliases": [
        "CVE-2026-44194",
        "GHSA-f59w-m967-9rf6"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/opnsense/core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "76ed1ef85a4bbcfc9cb1a2331e63a01e4f1e44fd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "26.1.8"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "26.1.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "26.1.6",
            "26.1.7",
            "26.1.5",
            "26.1.4",
            "26.1.3",
            "26.1.2",
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44194.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.183815243Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44194.json",
        "https://github.com/opnsense/core/security/advisories/GHSA-f59w-m967-9rf6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-44194"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-78"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44194.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-44194",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504269,
  "published_at": "2026-05-13T21:53:27.948+00:00"
}