What is CVE-2026-85479?

CVE-2026-85479 is a medium-severity vulnerability in Grid Protection Alliance Openhistorian, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-10-09.

How severe is CVE-2026-85479?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Grid Protection Alliance Openhistorian

CVE-2026-85479

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.

Vulnerability class: Broken Authentication

Published 2026-10-09 · last modified 2026-10-09.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

Frequently asked questions

What is CVE-2026-85479?: CVE-2026-85479 is a medium-severity vulnerability in Grid Protection Alliance Openhistorian, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-10-09.
How severe is CVE-2026-85479?: Medium severity. CVSS v3 base score is 5.3 out of 10.