CVE-2026-89209

State: Published
Severity: 7.6 High
Published: Oct 26, 2026
Updated: Oct 31, 2026
Reserved: Sep 11, 2026

Description

A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions < V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions < V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions < V3.6.29). 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 SAML response.

Scores

CVSS	Score	Vector	Source
4.0	7.6 High	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	siemens
3.1	6.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N	siemens

Weaknesses

CWE-294 Authentication Bypass by Capture-replay

Affected Products

Product	Versions
Mendix SAML (Mendix 10 compatible)Siemens	before V4.2.4Affected
Mendix SAML (Mendix 11 compatible)Siemens	before V4.2.4Affected
Mendix SAML (Mendix 9 compatible)Siemens	before V3.6.29Affected

References

https://cert-portal.siemens.com/productcert/html/ssa-137528.html

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