{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Mendix documentation for access rules does not adequately describe the special behavior of the System.User entity, leaving developers without sufficient guidance to configure access rules securely. This documentation gap may lead application developers to unknowingly apply overly permissive access rules to System.User, resulting in unintended exposure of sensitive user data or privilege escalation within deployed Mendix applications.\n\nA common misconfiguration identified is with the anonymous user role with a System.User entity to gain access to all stored records, even though no access rights are explicitly configured on that role.\n\nSiemens recommends Mendix developers to review their access rules based on updated documentation.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\n\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
      {
        "category": "general",
        "text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "productcert@siemens.com",
      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-814963: Insecure Inherited Permission in Mendix - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-814963.html"
      },
      {
        "category": "self",
        "summary": "SSA-814963: Insecure Inherited Permission in Mendix - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-814963.json"
      }
    ],
    "title": "SSA-814963: Insecure Inherited Permission in Mendix",
    "tracking": {
      "current_release_date": "2026-07-14T00:00:00.000Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-814963",
      "initial_release_date": "2026-07-14T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-07-14T00:00:00.000Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "Mendix Runtime",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix Runtime"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-7891",
      "cwe": {
        "id": "CWE-277",
        "name": "Insecure Inherited Permissions"
      },
      "notes": [
        {
          "category": "description",
          "text": "Mendix documentation for access rules does not adequately describe the special behavior of the System.User entity, leaving developers without sufficient guidance to configure access rules securely. This documentation gap may lead application developers to unknowingly apply overly permissive access rules to System.User, resulting in unintended exposure of sensitive user data or privilege escalation within deployed Mendix applications.",
          "title": "CVE Description"
        }
      ],
      "product_status": {
        "known_affected": [
          "1"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Any security model relying solely on XPath constraints on a System.User specialization to restrict access should be revised to enforce restrictions at the App Security role-management configuration level instead.",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Review mendix access rules knowing that System.User has built-in platform-enforced access rules that cannot be overridden or restricted by access rules defined on a specialization. Check updated documentation for further details",
          "product_ids": [
            "1"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "title": "CVE-2026-7891"
    }
  ]
}