CVE-2026-80465

HIGH

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) (...

Affects 0 products across 1 vendor.

CVSS 3.18.7
CVSS v48.8
EPSS0.3%
Percentile18th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, high complexity, no authentication required, no user interaction needed, can impact systems beyond the vulnerable component, full confidentiality impact, full integrity impact, no availability impact.
CWE Weakness Definitions
CWE-347: CWE-347
Related Attack Patterns (CAPEC)
CAPEC-463 Padding Oracle Crypto Attack
via CWE-347
CAPEC-475 Signature Spoofing by Improper Validation
via CWE-347

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A high severity vulnerability (CVE-2026-80465) affects the target system. 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 mod...

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Frequently Asked Questions
What is CVE-2026-80465?
A high severity vulnerability (CVE-2026-80465) affects the target system. 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 mod...
What is the CVSS score for CVE-2026-80465?
CVE-2026-80465 has CVSS 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N. EPSS: 0.3%.
Is CVE-2026-80465 actively exploited?
No confirmed active exploitation of CVE-2026-80465 as of 2026-09-25.
How do I remediate CVE-2026-80465?
Apply vendor patches for CVE-2026-80465. Monitor Siemens advisories.
What systems are affected by CVE-2026-80465?
CVE-2026-80465 affects: Siemens.
Vulnerability Details
CVE IDCVE-2026-80465
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Published2026-09-03
Last Modified2026-09-15
ICS Relevance55%
Weakness (CWE)
CWE-347
SourceNVD
Official 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.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductFixed Version
Siemens &mdash; —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: September 2026 | Threat Age: 25 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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