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Fencer Intel
high 8.8

CVE-2026-104629 json

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

published last mo. modified last mo. also EUVD-2026-95783

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

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.

Patch / fix

  • Grid Protection Alliance openPDC 2.9.477, 2.9.482
  • Grid Protection Alliance openPDC (Docker image) 2.9.477, 2.9.482
  • Grid Protection Alliance openHistorian 2.8.580, 2.8.585

Is CVE-2026-104629 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-281-02 updated cvss 8.8

Grid Protection Alliance openPDC and openHistorian

  • Grid Protection Alliance openHistorian <2.8.580 Grid Protection Alliance openPDC <2.9.477
    affected: vendor fix gridprotectionalliance.org
  • Grid Protection Alliance openPDC (Docker image) <2.9.477
    affected: no fix planned “Grid Protection Alliance does not recommend production use of published Docker images in any case. The fix for this vulnerability has not been published to the Docker image.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 7.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 7.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Grid Protection Alliance openPDC
  • Grid Protection Alliance openPDC (Docker image)
  • Grid Protection Alliance openHistorian

Classification

Weakness
  • CWE-470 Use of Externally-Controlled Input to Select Classes or Code

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.