CVE-2026-89209

MEDIUM

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...

Affects 0 products across 1 vendor.

CVSS 3.16.8
CVSS v47.6
EPSS0.3%
Percentile18th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, high complexity, no authentication required, requires user interaction, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, no availability impact.
CWE Weakness Definitions
CWE-294: CWE-294
Related Attack Patterns (CAPEC)
CAPEC-60 Reusing Session IDs (aka Session Replay)
via CWE-294
CAPEC-102 Session Sidejacking
via CWE-294
CAPEC-509 Kerberoasting
via CWE-294
CAPEC-561 Windows Admin Shares with Stolen Credentials
via CWE-294
CAPEC-644 Use of Captured Hashes (Pass The Hash)
via CWE-294
Show all 10

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

◆ AI Analysis — automated analysis, not human-reviewed

A medium severity vulnerability (CVE-2026-89209) affects the target system. 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...

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Frequently Asked Questions
What is CVE-2026-89209?
A medium severity vulnerability (CVE-2026-89209) affects the target system. 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...
What is the CVSS score for CVE-2026-89209?
CVE-2026-89209 has CVSS 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N. EPSS: 0.3%.
Is CVE-2026-89209 actively exploited?
No confirmed active exploitation of CVE-2026-89209 as of 2026-11-04.
How do I remediate CVE-2026-89209?
Advisory: https://cert-portal.siemens.com/productcert/html/ssa-137528.html
What systems are affected by CVE-2026-89209?
CVE-2026-89209 affects Siemens.
Vulnerability Details
CVE IDCVE-2026-89209
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Published2026-10-29
Last Modified2026-10-31
ICS Relevance55%
Weakness (CWE)
CWE-294
SourceCISA
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 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.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductAffected Versions
Siemens — —
Remediation
View Vendor Advisory →
Threat Intelligence
● Threat Intelligence Validated: November 2026 | Threat Age: 6 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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