CVE-2026-85479

MEDIUM 5.3

Grid Protection Alliance openPDC and openHistorian Missing Authentication for Critical Function

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	grid protection alliance
Product	openpdc
Published	Oct 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

Grid Protection Alliance / openPDC

0 < 2.9.477 0 < 2.9.482

Grid Protection Alliance / openPDC (Docker image)

0 < 2.9.477 0 < 2.9.482

Grid Protection Alliance / openHistorian

0 < 2.8.580 0 < 2.8.585

References

NVD ↗ CVE.org ↗ EPSS Data ↗

cisa.gov: https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-02 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-02.json

Credits

Shubham Raj (Cipher) of Causal Security reported this vulnerability to CISA.