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

Source: https://junglewise.ai/threats/cve-2026-42949-a-authorization-bypass-vulnerability-exists-in-the-api-runscript  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-29. Updated: 2026-10-29  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/fuxa). Vendors: [Frangoteam](https://junglewise.ai/threats/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

- [https://talosintelligence.com/vulnerability_reports/TALOS-2026-2417](https://talosintelligence.com/vulnerability_reports/TALOS-2026-2417)

## Related threats

- [FUXA /nodered authorization bypass to RCE](https://junglewise.ai/threats/cve-2026-42922-a-authorization-bypass-vulnerability-exists-in-the-nodered)
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- [FUXA unauthenticated information disclosure in Socket.IO handlers](https://junglewise.ai/threats/cve-2026-67440-fuxa-unauthenticated-information-disclosure-in-socket-io-handlers)
- [Frangoteam FUXA privilege escalation in Scheduler API](https://junglewise.ai/threats/cve-2026-47721-frangoteam-fuxa-privilege-escalation-in-scheduler-api)
- [frangoteam FUXA SQL injection in TDengine DAQ connector](https://junglewise.ai/threats/cve-2026-47720-frangoteam-fuxa-sql-injection-in-tdengine-daq-connector)