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Industrial control advisorySeverity 8.7 high
Siemens Mendix SAML
ICSA-26-258-06 · CISA · September 3, 2026
Summary
Mendix SAML module contains a vulnerability that could allow unauthenticated remote attackers to hijack an account in specific SSO configurations.
Mendix has provided fix releases for the Mendix SAML module and recommends to update to the latest version.
From CISA, quoted as published. Check the source before acting.
What to do
Update to V3.6.29 or later version
Update to V4.2.4 or later version
Vendor fix or mitigation, quoted from the advisory.
Each CVE in this advisory
| CVE | Severity | Known exploited | Exploit likelihood |
|---|---|---|---|
| CVE-2026-80465 | 8.7 high | No | 0.3% |
Severity from the advisory (CVSS), known exploitation from CISA's catalog, exploit likelihood from EPSS (next 30 days).
Affected products
| Vendor | Product |
|---|---|
| Siemens | Mendix SAML (Mendix 10 compatible) |
| Siemens | Mendix SAML (Mendix 11 compatible) |
| Siemens | Mendix SAML (Mendix 9.24 compatible) |
Why it's on these mode pages
- Maritime: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
Change history
- September 3, 2026: Publication Date
- September 15, 2026: CISA Republication - Initial CISA Republication of Siemens ProductCERT SSA-887643 advisory
- October 26, 2026: Released new fixed versions, as the previous versions did not fully remediate the vulnerability.
- October 29, 2026: CISA Republication update based on Siemens ProductCERT SSA-887643 advisory
- November 9, 2026: First collected by Watch
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