{
  "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 SAML module contains a vulnerability that could allow unauthenticated remote attackers to hijack an account in specific SSO configurations.\n\nMendix has provided fix releases for the Mendix SAML module and recommends to update to the latest version.",
        "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-887643: Account Hijacking Vulnerability in Mendix SAML module - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-887643.html"
      },
      {
        "category": "self",
        "summary": "SSA-887643: Account Hijacking Vulnerability in Mendix SAML module - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-887643.json"
      }
    ],
    "title": "SSA-887643: Account Hijacking Vulnerability in Mendix SAML module",
    "tracking": {
      "current_release_date": "2026-09-03T00:00:00.000Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-887643",
      "initial_release_date": "2026-09-03T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-09-03T00:00:00.000Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "interim",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c4.2.3",
                "product": {
                  "name": "Mendix SAML (Mendix 10 compatible) \u003c V4.2.3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix SAML (Mendix 10 compatible)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c4.2.3",
                "product": {
                  "name": "Mendix SAML (Mendix 11 compatible) \u003c V4.2.3",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix SAML (Mendix 11 compatible)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c3.6.27",
                "product": {
                  "name": "Mendix SAML (Mendix 9.24 compatible) \u003c V3.6.27",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix SAML (Mendix 9.24 compatible)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-80465",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "notes": [
        {
          "category": "description",
          "text": "Affected versions of the module do not properly validate the SAML response signature. This could allow unauthenticated remote attackers to hijack an account (session) in specific SSO configurations.",
          "title": "CVE Description"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V3.6.27 or later version",
          "product_ids": [
            "3"
          ],
          "url": "https://marketplace.mendix.com/link/component/1174"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.2.3 or later version",
          "product_ids": [
            "1"
          ],
          "url": "https://marketplace.mendix.com/link/component/1174"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.2.3 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://marketplace.mendix.com/link/component/1174"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3"
          ]
        }
      ],
      "title": "CVE-2026-80465"
    }
  ]
}