What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-09
• Weakness: CWE-470

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.

Affected products

• Grid Protection Alliance openHistorian: before 2.8.580; before 2.8.585 — fixed in 2.8.580, 2.8.585
• Grid Protection Alliance openPDC: before 2.9.477; before 2.9.482 — fixed in 2.9.477, 2.9.482
• Grid Protection Alliance openPDC (Docker image): before 2.9.477; before 2.9.482 — fixed in 2.9.477, 2.9.482

How to fix

Upgrade to a fixed version: Grid Protection Alliance openHistorian 2.8.580, 2.8.585; Grid Protection Alliance openPDC 2.9.477, 2.9.482; Grid Protection Alliance openPDC (Docker image) 2.9.477, 2.9.482. Check the vendor advisory for mitigations.

References

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

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