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 9.24 compatible) (All versions < V3.6.29). 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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | Mendix SAML (Mendix 10 compatible) | < V4.2.4 | V4.2.4 |
| Siemens | Mendix SAML (Mendix 11 compatible) | < V4.2.4 | V4.2.4 |
| Siemens | Mendix SAML (Mendix 9.24 compatible) | < V3.6.29 | V3.6.29 |
Advisories 2
- ICSA-26-258-06 Siemens Mendix SAML CISA ICS & IT advisories · Oct 29, 2026
- SSA-887643 SSA-887643: Account Hijacking Vulnerability in Mendix SAML module Siemens ProductCERT · Oct 26, 2026