Medium · CVSS 5.3CVE-2026-101022

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

Answer in brief

CVE-2026-101022 records a Medium severity (CVSS 5.3) vulnerability in Grid Protection Alliance openPDC and openHistorian Server-Side Request Forgery (SSRF). The current sources do not mark it as known exploited. The current feed maps Grid Protection Alliance/openHistorian (generic), Grid Protection Alliance/openPDC (generic), Grid Protection Alliance/openPDC (Docker image) (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 9, 2026Updated Oct 9, 2026Source checked Oct 9, 2026First seen by HOL Oct 9, 2026Material review Oct 9, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Grid Protection Alliance/openHistorian (generic), Grid Protection Alliance/openPDC (generic), Grid Protection Alliance/openPDC (Docker image) (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Grid Protection Alliance/openHistoriangeneric	>=0 <2.8.580 \|\| >=0 <2.8.585	2.8.580, 2.8.585
Grid Protection Alliance/openPDCgeneric	>=0 <2.9.477 \|\| >=0 <2.9.482	2.9.477, 2.9.482
Grid Protection Alliance/openPDC (Docker image)generic	>=0 <2.9.477 \|\| >=0 <2.9.482	2.9.477, 2.9.482

Recommended response

Check inventory. Check lockfiles and deployed manifests for Grid Protection Alliance/openHistorian, Grid Protection Alliance/openPDC, Grid Protection Alliance/openPDC (Docker image).
Review the reported fix. Source-reported workarounds: 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. 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.

Evidence timeline and material changes

Published upstream
Oct 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 9, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.