CVE-2026-80465

high

Description

A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions < V4.2.3), Mendix SAML (Mendix 11 compatible) (All versions < V4.2.3), Mendix SAML (Mendix 9.24 compatible) (All versions < V3.6.27). 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.

References

References
More

https://www.cisa.gov/news-events/ics-advisories/icsa-26-258-06

https://cert-portal.siemens.com/productcert/html/ssa-887643.html

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-70411

Details

Source: Mitre, NVD

Published: 2026-09-03

Updated: 2026-09-08

Risk Information

CVSS v2

Base Score: 7.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.7

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Severity: High

CVSS v4

Base Score: 8.8

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Severity: High

EPSS

EPSS: 0.00276