CVE-2026-100730

Grid Protection Alliance openPDC and openHistorian Deserialization of Untrusted Data

Published Oct 9, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
A service console interface on openPDC and openHistorian deserializes a client-supplied data structure. On systems using Windows Authentication, an attacker must already be authenticated to reach this function; on systems without Windows Authentication, this is reachable by an unauthenticated network attacker. This allows an attacker to trigger deserialization of an arbitrary object graph, which could allow remote code execution under the privileges of the affected service account.

Remediation

Vendor Solution

Grid Protection Alliance has added additional validation into serialization logic in openPDC version 2.9.482 and later and openHistorian version 2.8.585 and later. Systems using Windows Authentication are additionally protected, as they require the attacker to already be authenticated to reach this function.


Vendor Workaround

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.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Grid Protection Alliance
Grid Protection Alliance openhistorian
Grid Protection Alliance openpdc
Vendors & Products Grid Protection Alliance
Grid Protection Alliance openhistorian
Grid Protection Alliance openpdc
Type Values Removed Values Added
Description A service console interface on openPDC and openHistorian deserializes a client-supplied data structure. On systems using Windows Authentication, an attacker must already be authenticated to reach this function; on systems without Windows Authentication, this is reachable by an unauthenticated network attacker. This allows an attacker to trigger deserialization of an arbitrary object graph, which could allow remote code execution under the privileges of the affected service account.
Title Grid Protection Alliance openPDC and openHistorian Deserialization of Untrusted Data
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Oct 11, 2026, 5:05 PM
Reserved
Oct 5, 2026, 4:54 PM
Status
Awaiting Analysis
Published
Oct 9, 2026, 2:17 PM
Modified
Oct 11, 2026, 5:16 PM