Medium SSRF

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

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.

Published Oct 9, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: icscert

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1
Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.19%

ahead of 8% of scored CVEs · Oct 14, 2026

Affects

Grid Protection Alliance

openHistorian and 2 more

CVSS base

4.3

Medium · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Grid Protection Alliance openHistorian, Grid Protection Alliance openPDC, Grid Protection Alliance openPDC (Docker image)).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (ssrf), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Grid Protection Alliance	openHistorian	< 2.8.580< 2.8.585	Vulnerable	CVE Program (cve.org) e CISA ADP
Grid Protection Alliance	openPDC	< 2.9.477< 2.9.482	Vulnerable	CVE Program (cve.org) e CISA ADP
Grid Protection Alliance	openPDC (Docker image)	< 2.9.477< 2.9.482	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
5.3	CVSS 4.0	Medium	—	—	ics-cert@hq.dhs.gov via NIST National Vulnerability Database
5.3	CVSS 4.0	Medium	—	—	icscert via CVE Program (cve.org) e CISA ADP
4.3	CVSS 3.1	Medium	2.8	1.4	ics-cert@hq.dhs.gov via NIST National Vulnerability Database
4.3	CVSS 3.1	Medium	—	—	GitHub, Inc. via GitHub Security Advisories
4.3	CVSS 3.1	Medium	—	—	icscert via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N (score shown at the top: ics-cert@hq.dhs.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-918 · Server-Side Request Forgery (SSRF)

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.19%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Monitor outbound requests from the server to internal IPs and cloud metadata endpoints.

web/proxy/WAF logsnetwork IDS/IPSegress traffic

Timeline

What happened to this CVE, newest first.

2026
Affected products added · grid protection alliance/openpdc, grid protection alliance/openpdc (docker image), grid protection alliance/openhistoria
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 4.3
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Awaiting Analysis
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Oct 9, 2026 · icscert

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 13, 2026 – Oct 13, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

4 on the record

github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-02.jso
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-101022
GitHub Security Advisories
github.com/advisories/GHSA-q8fp-gfvc-6mwj
GitHub Security Advisories
www.cisa.gov/news-events/ics-advisories/icsa-26-281-02
NIST National Vulnerability Database

Elsewhere on this site

Grid Protection Alliance
every CVE for this vendor

SSRF
same class

CWE-918
other pages naming this weakness

Related CVEs (same products)

Critical CVE-2026-105278 Grid Protection Alliance openPDC (Docker image) Use of Hard-coded Credentials 6d
Medium CVE-2026-85479 Grid Protection Alliance openPDC and openHistorian Missing Authentication for Critical Function 6d
High CVE-2026-104629 Grid Protection Alliance openPDC and openHistorian Use of Externally-Controlled Input to Select Classes or Code 6d
High CVE-2026-105281 Grid Protection Alliance openPDC and openHistorian Missing Authentication for Critical Function 6d
Critical CVE-2026-100730 Grid Protection Alliance openPDC and openHistorian Deserialization of Untrusted Data 6d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-101022 is "Grid Protection Alliance openPDC and openHistorian Server-Side Request Forgery (SSRF)", rated Medium. It affects openHistorian (Grid Protection Alliance); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 4.3 describes technical severity. EPSS 0.19% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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