Siemens Mendix Runtime

View CSAF Summary 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. A 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. Siemens recommends Mendix developers to review their access rules based on updated documentation. The following versions of Siemens Mendix Runtime are affected: Mendix Runtime vers:all/* (CVE-2026-7891) CVSS Vendor Equipment Vulnerabilities v3 9.1 Siemens Siemens Mendix Runtime Insecure Inherited Permissions Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-7891 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. View CVE Details Affected Products Siemens Mendix Runtime Vendor: Siemens Product Version: Mendix Runtime Product Status: known_affected Remediations Mitigation 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. Vendor fix Review mendix access rul