6.8
Medium
CVE-2026-89209 A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions < V4.2.4), Mendix SAML (Mendix…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Mendix SAML (Mendix 10 compatible) 4.2 | earliest → < 4.2.4 | 4.2.4 |
| Mendix SAML (Mendix 11 compatible) 4.2 | earliest → < 4.2.4 | 4.2.4 |
| Mendix SAML (Mendix 9 compatible) 3.6 | earliest → < 3.6.29 | 3.6.29 |