Siemens Mendix SAML

View CSAF Summary Mendix SAML module contains a vulnerability that could allow unauthenticated remote attackers to hijack an account in specific SSO configurations. Mendix has provided fix releases for the Mendix SAML module and recommends to update to the latest version. The following versions of Siemens Mendix SAML are affected: Mendix SAML (Mendix 10 compatible) vers:intdot/<4.2.3 (CVE-2026-80465) Mendix SAML (Mendix 11 compatible) vers:intdot/<4.2.3 (CVE-2026-80465) Mendix SAML (Mendix 9.24 compatible) vers:intdot/<3.6.27 (CVE-2026-80465) CVSS Vendor Equipment Vulnerabilities v3 8.7 Siemens Siemens Mendix SAML Improper Verification of Cryptographic Signature Background Critical Infrastructure Sectors: Critical Manufacturing, Information Technology Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-80465 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. View CVE Details Affected Products Siemens Mendix SAML Vendor: Siemens Product Version: Mendix SAML (Mendix 10 compatible) < V4.2.3, Mendix SAML (Mendix 11 compatible) < V4.2.3, Mendix SAML (Mendix 9.24 compatible) < V3.6.27 Product Status: known_affected Remediations Vendor fix Update to V3.6.27 or later version https://marketplace.mendix.com/link/component/1174 Vendor fix Update to V4.2.3 or later version https://marketplace.mendix.com/link/component/1174 Vendor fix Update to V4.2.3 or later version https://marketplace.mendix.com/link/component/1174 Relevant CWE: CWE-347 Improper Verification of Cryptographic Signature Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.7 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Acknowledgments Siemens ProductCERT reported this vulnerability to CISA. General Recommendations As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for Industrial Security, and following the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity Additional Resources For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories For more information see the associated Siemens security advisory SSA-887643 in HTML and CSAF. Terms of Use The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use. Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolate them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Impro