CVE-2026-101022 Grid Protection Alliance openPDC and openHistorian Server-Side Request Forgery (SSRF)
An authenticated user can exploit a Modbus feature to map internal networks via SSRF, exposing internal host reachability in Grid Protection Alliance openPDC and openHistorian.
- 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-2026-101022?
CVE-2026-101022 is a medium-severity server-side request forgery 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 Modbus connection feature on openPDC accepts a caller-specified destination address and port with no restriction on which internal hosts may be targeted. An authenticated user can attempt connections to arbitrary internal network destinations, revealing which destinations are reachable. With repeated attempts, an attacker may be able to map the internal network.
Weakness: CWE-918
Which versions are affected by CVE-2026-101022?
How do I fix CVE-2026-101022?
No fix has been published for CVE-2026-101022 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-101022 being exploited?
There is no known exploitation of CVE-2026-101022 in the wild and no public exploit code.
Sources
Also known as GHSA-q8fp-gfvc-6mwj.