CVE-2026-104629 Grid Protection Alliance openPDC and openHistorian Use of Externally-Controlled Input to Select Classes or Code
Authenticated attackers can execute arbitrary code by placing files on the host, leading to privilege escalation within the openPDC and openHistorian services.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104629?
CVE-2026-104629 is a high-severity code injection vulnerability in Grid Protection Alliance openHistorian, published on 9 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A component loading mechanism in openPDC and openHistorian will construct and run any specified type, which may be an invalid component to load. An attacker with an authenticated user account and the ability to place a file on the host filesystem can use this to run arbitrary constructor code, and this code runs with the privileges of the affected service account.
Weakness: CWE-470
Which versions are affected by CVE-2026-104629?
How do I fix CVE-2026-104629?
No fix has been published for CVE-2026-104629 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-104629 being exploited?
There is no known exploitation of CVE-2026-104629 in the wild and no public exploit code.
Sources
Also known as GHSA-68jv-q5j2-rgqm.