# CVE-2026-105281: Grid Protection Alliance openPDC data publisher missing authentication

Source: https://junglewise.ai/threats/cve-2026-105281-the-internal-data-publisher-on-openpdc-accepts-network  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-09. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-105281 · Severity: high · CVSS 7.5 · Published 2026-10-09

openPDC is a power system data management platform used by energy utilities to monitor and control electrical grids. Its internal data publisher service listens on the network without requiring authentication in the default configuration, allowing an attacker to remotely retrieve the complete map of all connected devices and measurements, which could facilitate further attacks on the grid infrastructure.

Technologies: [Grid Protection Alliance openHistorian](https://junglewise.ai/threats/technologies/openhistorian), [Grid Protection Alliance openPDC](https://junglewise.ai/threats/technologies/openpdc), [Grid Protection Alliance openPDC (Docker image)](https://junglewise.ai/threats/technologies/openpdc-docker-image). Vendors: [Grid Protection Alliance](https://junglewise.ai/threats/vendors/grid-protection-alliance).

## Quick answers

**Is CVE-2026-105281 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105281 being exploited in the wild.

**How severe is CVE-2026-105281?** High severity, with a CVSS score of 7.5, published 9 October 2026.

**Which products and versions are affected?** Grid Protection Alliance openHistorian before 2.8.585; Grid Protection Alliance openPDC before 2.9.482; Grid Protection Alliance openPDC (Docker image) before 2.9.482.

**Is there a fix for CVE-2026-105281?** Yes: fixed in openPDC 2.9.482, openHistorian 2.8.585. Until then: Update the default configuration to bind the data publisher interface to the local loopback address (127.0.0.1) only instead of all interfaces. Existing deployments should verify their configuration explicitly after upgrading, as prior configurations are retained and do not receive the new default automatically. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-105281 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-105281?** Check whether you run Grid Protection Alliance openHistorian, Grid Protection Alliance openPDC or Grid Protection Alliance openPDC (Docker image) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in openPDC 2.9.482, openHistorian 2.8.585

Update the default configuration to bind the data publisher interface to the local loopback address (127.0.0.1) only instead of all interfaces. Existing deployments should verify their configuration explicitly after upgrading, as prior configurations are retained and do not receive the new default automatically.

## Technical details

The data publisher component in openPDC and openHistorian accepts unauthenticated network connections by default (CWE-306: Missing Authentication for Critical Function), exposing the system topology to any network attacker. The fix modifies the default configuration to bind this interface to the local loopback address only, though existing deployments retain their prior configuration and require manual remediation. This is a network-reachable information disclosure vulnerability with no authentication or user interaction required.

## Affected products

- Grid Protection Alliance openPDC before 2.9.482
- Grid Protection Alliance openPDC (Docker image) before 2.9.482
- Grid Protection Alliance openHistorian before 2.8.585

## Timeline

- 2026-10-08: disclosed

## References

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

## Related threats

- [Grid Protection Alliance openPDC Docker hardcoded credential](https://junglewise.ai/threats/cve-2026-105278-the-published-docker-image-for-openpdc-includes-a-fixed)
- [openPDC STTP data publisher missing authentication](https://junglewise.ai/threats/cve-2026-85479-the-sttp-based-data-publisher-on-openpdc-accepts-network)
- [Grid Protection Alliance openPDC and openHistorian deserialization and authentication vulnerabilities](https://junglewise.ai/threats/cve-2026-104629-grid-protection-alliance-openpdc-and-openhistorian)
- [Grid Protection Alliance openPDC Modbus SSRF network reconnaissance](https://junglewise.ai/threats/cve-2026-101022-a-modbus-connection-feature-on-openpdc-accepts-a-caller)
- [Grid Protection Alliance openPDC and openHistorian unsafe deserialization](https://junglewise.ai/threats/cve-2026-100730-a-service-console-interface-on-openpdc-and-openhistorian)