# 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.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Oct 2026
- **Updated:** 9 Oct 2026
- **Also known as:** GHSA-q8fp-gfvc-6mwj

## 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 (Server-Side Request Forgery)

## 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.

## Is CVE-2026-101022 being exploited?

There is no known exploitation of CVE-2026-101022 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-101022 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-101022 in the wild and no public exploit code.

Affected product: Grid Protection Alliance openHistorian. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-101022/ (Markdown: https://insights.sbomify.com/CVE-2026-101022/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-101022
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-101022
- OSV: https://osv.dev/vulnerability/CVE-2026-101022

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-101022/
Summaries are generated and may contain mistakes; the official description above is the record.