Vulnerability record/PUBLISHED/Published Sep 3, 2026 11:25:10 UTC

CVE-2026-80465

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.

Base score8.8/ 10

SeverityHighCVSS 4.0

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityHigh

Attack vectorNetworkAV

Attack complexityHighAC

Attack requirementsPresentAT

Privileges requiredNonePR

User interactionPassiveUI

Vulnerable system confidentialityHighVC

Vulnerable system integrityHighVI

Vulnerable system availabilityNoneVA

Subsequent system confidentialityHighSC

Subsequent system integrityHighSI

Subsequent system availabilityNoneSA

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

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authoritysiemens

Last updatedOct 26, 2026 10:40:59 UTC

PublishedSep 3, 2026 11:25:10 UTC

ReservedAug 26, 2026 12:49:28 UTC