Vulnerability · Published Oct 9, 2026 · Assigned by icscert
CVE-2026-100730Grid Protection Alliance openPDC and openHistorian Deserialization of Untrusted Data
Critical 9.8
In plain English
A critical-severity unsafe deserialization in openHistorian from Grid Protection Alliance. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grid Protection Alliance | openPDC | 0 – before 2.9.4770 – before 2.9.482 |
| Grid Protection Alliance | openPDC (Docker image) | 0 – before 2.9.4770 – before 2.9.482 |
| Grid Protection Alliance | openHistorian | 0 – before 2.8.5800 – before 2.8.585 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H