Vulnerability · Published Sep 3, 2026 · Assigned by siemens
CVE-2026-80465
High 8.7
In plain English
A high-severity security flaw in Mendix SAML (Mendix 10 compatible) from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Mendix SAML (Mendix 10 compatible) | 0 – before V4.2.4 |
| Siemens | Mendix SAML (Mendix 11 compatible) | 0 – before V4.2.4 |
| Siemens | Mendix SAML (Mendix 9.24 compatible) | 0 – before V3.6.29 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N