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TI-2021-18547 Aliases CVE-2021-42026GHSA-2j3j-g2v5-fh5c

Incorrect authorization in Siemens Mendix Applications using Mendix 8

Priority LOW 21CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-863.

Summary

A vulnerability has been identified in Mendix Applications using Mendix 8 (All versions < V8.18.13), Mendix Applications using Mendix 9 (All versions < V9.6.2). Applications built with affected versions of Mendix Studio Pro do not properly control read access for certain client actions. This could allow authenticated attackers to retrieve the changedDate attribute of arbitrary objects, even when they don't have read access to them.

Why it matters now

EPSS 0.00566 47th percentileScored 2026-11-07
Fix Fixed Mendix Applications using Mendix 8 (Siemens): V8.18.13Mendix Applications using Mendix 9 (Siemens): V9.6.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensMendix Applications using Mendix 8before V8.18.13V8.18.13Patch availableCNA
SiemensMendix Applications using Mendix 9before V9.6.2V9.6.2Patch availableCNA
  • Mendix Applications using Mendix 8 VendorSiemens Affected before V8.18.13 Fixed in V8.18.13 Patch available CNA
  • Mendix Applications using Mendix 9 VendorSiemens Affected before V9.6.2 Fixed in V9.6.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mendix:mendix:*:*:*:*:*:*:*:*8.0.0 to before 8.18.13; 9.0.0 to before 9.6.2VulnerableMendix
  • cpe:2.3:a:mendix:mendix:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.18.13; 9.0.0 to before 9.6.2 Vulnerable ·Mendix

Remediation

  • Fix · CNA Mendix Applications using Mendix 8 (Siemens) Fixed in V8.18.13
  • Fix · CNA Mendix Applications using Mendix 9 (Siemens) Fixed in V9.6.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42026
  2. 2026-10-03 Alias added: GHSA-2j3j-g2v5-fh5c

References

Patch 1

  • TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-18911 Heap-based buffer overflow in Fortinet FortiSwitchManager KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
See all 2487 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences