All vulnerabilities
CVE-2026-100730

Grid Protection Alliance openPDC and openHistorian Deserialization of Untrusted Data

Grid Protection Alliance openPDC
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.63%Chance of exploitation activity in the next 30 days, higher than 49% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.9.477Also 2.9.482, 2.8.580 and 1 moreCVE List
Published9 Oct 2026Updated 11 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 8

  • openPDCaffected: all versions before 2.9.477CVE List
  • openPDCaffected: all versions before 2.9.482CVE List
  • openPDCunaffected: 2.9.482CVE List
  • openPDC (Docker image)affected: all versions before 2.9.477CVE List
  • openPDC (Docker image)affected: all versions before 2.9.482CVE List
  • openHistorianaffected: all versions before 2.8.580CVE List
  • openHistorianaffected: all versions before 2.8.585CVE List
  • openHistorianunaffected: 2.8.585CVE List

References 2