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Fencer Intel
medium 4.3

CVE-2026-101022 json

Grid Protection Alliance openPDC and openHistorian Server-Side Request Forgery (SSRF)

published last mo. modified last mo. also EUVD-2026-95782

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

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.

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

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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 4.3

Grid Protection Alliance openPDC and openHistorian

  • Grid Protection Alliance openHistorian <2.8.585 Grid Protection Alliance openPDC <2.9.482 Grid Protection Alliance openPDC (Docker image) <2.9.482
    affected: mitigation “Grid Protection Alliance recommends restricting network access to modbus using a firewall, and disallowing connections to loopback and private (RFC 1918) address ranges unless explicitly required.”

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
partial
Assessed
last mo.

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA 4.0 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
CNA 4.0 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/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-918 Server-Side Request Forgery

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.