CVE-2026-43946 FUXA has an unauthenticated arbitrary tag value disclosure via /api/getTagValue
Unauthenticated attackers can read arbitrary tag values in FUXA SCADA software via the /api/getTagValue endpoint when referenced scripts are missing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43946?
CVE-2026-43946 is a high-severity missing authorization vulnerability in frangoteam FUXA, published on 21 Jul 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. Version 1.3.0 has an authorization bypass in the /api/getTagValue endpoint allows unauthenticated access to tag values when the referenced script does not exist. Version 1.3.1 patches the issue.
Weakness: CWE-863
Which versions are affected by CVE-2026-43946?
2 open source packages ship an affected version, including fuxa-server.
| Package | Affected | Fixed in |
|---|---|---|
fuxa-server npm | From 1.3.0 | 1.3.1 |
fuxa-server npm | From 1.3.0 | 1.3.1 |
How do I fix CVE-2026-43946?
Upgrade fuxa-server to 1.3.1 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-43946 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43946 exists.
Sources
Also known as GHSA-fwcm-rqvw-j3p7.