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CVE-2026-89209VulnerabilityPublished

Mendix SAML (Mendix · CWE-294

Source GCVE Database

0
Authoritative record:CVE-2026-89209· Medium 6.8

Not known to be exploited · CVSS 6.8 Medium : upgrade to 4.2.4 when convenient.

Data as of 26 Oct 2026, 15:56 UTC

CVSS 3.1 base score
6.8Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 4.2.4, 3.6.29
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade Mendix SAML (Mendix 10 compatible) and Mendix SAML (Mendix 11 compatible) to 4.2.4; Mendix SAML (Mendix 9 compatible) and com.siemens/mendix-saml to 3.6.29.

Affected software

ProductAffectedFixed in
SiemensMendix SAML (Mendix 10 compatible)Affected
  • <4.2.4
Fixed in
  • 4.2.4
SiemensMendix SAML (Mendix 11 compatible)Affected
  • <4.2.4
Fixed in
  • 4.2.4
SiemensMendix SAML (Mendix 9 compatible)Affected
  • <3.6.29
Fixed in
  • 3.6.29
Mavencom.siemens/mendix-samlpkg:maven/com.siemens/mendix-samlOther threatsAffected
  • <3.6.29
Fixed in
  • 3.6.29

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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.

References

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