Vulnerability · Published Oct 9, 2026 · Assigned by icscert
CVE-2026-85479Grid Protection Alliance openPDC and openHistorian Missing Authentication for Critical Function
Medium 5.3
In plain English
A medium-severity missing authentication 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 0.3% (higher than 17% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 83.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The STTP-based data publisher on openPDC accepts network connections without authentication in its default configuration. An unauthenticated network attacker can connect to this interface and exchange data with it.
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-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N