CVE-2026-67440 FUXA: Unauthenticated Socket.IO read events
Unauthenticated users can access sensitive device and host metadata in FUXA when secure mode is enabled, exposing system discovery information.
- 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-2026-67440?
CVE-2026-67440 is a medium-severity 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 DEVICE_BROWSE, DEVICE_NODE_ATTRIBUTE, HOST_INTERFACES, and DEVICE_TAGS_REQUEST handlers in server/runtime/index.js return device-discovery, node-attribute, host-network-interface, and device-tag metadata without isSocketAdminAuthorized when secureEnabled is true. A remote unauthenticated or guest user can invoke these metadata-oriented Socket.IO events and collect system-discovery information that is not required for normal public HMI viewing, while ordinary device status, value, alarm, and dashboard events remain intentionally public. This issue is fixed in version 1.3.3.
Weakness: CWE-862
Which versions are affected by CVE-2026-67440?
How do I fix CVE-2026-67440?
No fix has been published for CVE-2026-67440 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-2026-67440 being exploited?
There is no known exploitation of CVE-2026-67440 in the wild and no public exploit code.
Sources
Also known as GHSA-rh5p-m38p-2w75.