CVE-2026-67443 FUXA: Unauthenticated guest JWT bypasses Node-RED secure-mode authorization gate (Remote Script Execution)
Unauthenticated attackers can bypass Node-RED authorization in FUXA to deploy malicious scripts and execute arbitrary code on the host system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67443?
CVE-2026-67443 is a critical missing authorization vulnerability in frangoteam FUXA, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. In 1.3.2 and earlier, the allowDashboard authorization gate in server/integrations/node-red/index.js calls authJwt.verify for /nodered without inspecting the decoded identity. When nodeRedEnabled is true, secureEnabled is true, and nodeRedAuthMode is secure, a remote unauthenticated attacker can obtain a signed guest token from POST /api/heartbeat and use it to access the RED.httpAdmin editor and flow deployment API. Because the Node-RED configuration has no second adminAuth gate, the attacker can deploy function nodes or invoke fuxa.runScript and runtime.scriptsMgr.runScript, gaining control of FUXA project data, configuration, scripts, filesystem-capable runtime helpers, and potentially operating-system commands when nodeRedUnsafeModules is enabled. This issue is fixed in version 1.3.3.
Weakness: CWE-862
Which versions are affected by CVE-2026-67443?
How do I fix CVE-2026-67443?
No fix has been published for CVE-2026-67443 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-67443 being exploited?
There is no known exploitation of CVE-2026-67443 in the wild and no public exploit code.
Sources
Also known as GHSA-5h5x-9h7x-23f4.