Advisoriesby IbisSiemensCVE-2026-89209
Siemens Mendix SAML (Mendix: capture-replay
Fix: upgrade to V4.2.4 or later (3 fixed versions below)
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Mendix SAML (Mendix 10 compatible) Product | < V4.2.4 | V4.2.4 |
| Mendix SAML (Mendix 11 compatible) Product | < V4.2.4 | V4.2.4 |
| Mendix SAML (Mendix 9 compatible) Product | < V3.6.29 | V3.6.29 |
Details and references
- CVSS 4.0
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-294