CVE-2026-85479 Grid Protection Alliance openPDC and openHistorian Missing Authentication for Critical Function
Unauthenticated attackers can connect to the STTP data publisher interface to exchange data, affecting Grid Protection Alliance openPDC and openHistorian users.
- 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-2026-85479?
CVE-2026-85479 is a medium-severity missing authorization vulnerability in Grid Protection Alliance openHistorian, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The STTP-based data publisher on openPDC accepts network connections without authentication in its default configuration. An unauthenticated network attacker can connect to this interface and exchange data with it.
Weakness: CWE-306
Which versions are affected by CVE-2026-85479?
How do I fix CVE-2026-85479?
No fix has been published for CVE-2026-85479 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-2026-85479 being exploited?
There is no known exploitation of CVE-2026-85479 in the wild and no public exploit code.
Sources
Also known as GHSA-xr5w-f3rm-m5gq.