CVE-2026-42949: FUXA authorization bypass in /api/runscript

CVE-2026-42949 · Severity: medium · CVSS 5.6 · Published 2026-10-29

FUXA is an open-source web-based HMI (Human Machine Interface) software that allows users to build dashboards for monitoring and controlling industrial processes. An authorization bypass vulnerability in the /api/runscript endpoint allows an unauthenticated attacker to execute privileged automation scripts, potentially gaining unauthorized control over connected industrial systems or processes.

Technologies: Frangoteam FUXA. Vendors: Frangoteam.

Quick answers

Is CVE-2026-42949 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-42949 being exploited in the wild.
How severe is CVE-2026-42949?
Medium severity, with a CVSS score of 5.6, published 29 October 2026.
Which products and versions are affected?
Frangoteam FUXA 1.3.2-2809.
Is there a fix for CVE-2026-42949?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-42949 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-42949?
Check whether you run Frangoteam FUXA at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The /api/runscript endpoint performs authorization checks using the script object directly from the request body, but executes scripts identified by a different reference, creating a mismatch that bypasses permission validation. The vulnerability affects the script identification logic between the isAuthorised authorization function and the runScript execution function. An unauthenticated attacker can send a crafted POST request to execute automated operations without proper permissions.

Affected products

  • frangoteam FUXA 1.3.2-2809

Timeline

  • 2026-10-29: disclosed

References

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