CVE-2026-6819

HKUDS OpenHarness Plugin Management Command Exposure

Published Apr 21, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Description

HKUDS OpenHarness prior to PR #156 remediation exposes plugin lifecycle commands including /plugin install, /plugin enable, /plugin disable, and /reload-plugins to remote senders by default. Attackers who gain access through the channel layer can remotely manage plugin trust and activation state, enabling unauthorized plugin installation and activation on the system.

Analysis

Technical impact

The vulnerability arises from HKUDS OpenHarness exposing plugin lifecycle commands, such as "/plugin install", "/plugin enable", "/plugin disable", and "/reload-plugins", through its channel layer by default. This exposure allows an attacker that can reach the channel layer to remotely manage plugin trust and activation state, enabling the installation and activation of unauthorized plugins. The flaw is a misconfiguration related to privilege management, identified as CWE–276, and the CVSS score of 8.7 reflects the high impact of potential unauthorized code execution.

Affected Systems

The affected platform is HKUDS OpenHarness. All versions prior to the remediation commit merged in PR #156 suffer from the exposure. The patch is available in the v0.1.7 release, which incorporates the fix that restricts plugin lifecycle endpoints to authorized users only.

Risk and Exploitability

The vulnerability can be exploited by any remote sender that can access the channel layer, with no additional authentication required. Attackers can trigger unsafe plugin state changes, potentially elevating their privileges or injecting malicious code. The EPSS score is not available, and the vulnerability is not listed in the CISA KEV catalog, but the lack of exposure controls combined with the high CVSS indicates a significant risk for systems that have not applied the latest patch.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

HKUDS

OpenHarness

unaffected

Version	Status	Constraints
`0`	affected	< PR #156

Configuration 1 [-]

cpe:2.3:a:hkuds:openharness:*:*:*:*:*:*:*:*

No data.

Vendor Product Versions

Hkuds

Openharness

Version	Status	Scheme	Platform
`[0, PR #156)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade OpenHarness to the latest release v0.1.7 or later to apply the patch from PR #156.
Configure the channel layer to restrict access to trusted users only, for example by enforcing authentication or by limiting traffic with firewall rules targeting the plugin management endpoints.
Verify that the plugin lifecycle endpoints are no longer publicly accessible and that they require proper authorization before execution.

Generated by OpenCVE AI on April 22, 2026 at 05:26 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.293% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://github.com/HKUDS/OpenHarness/commit/59017e09880fcf9a6f60456a84fb982900b2c0b2
https://github.com/HKUDS/OpenHarness/pull/156
https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7
https://www.vulncheck.com/advisories/hkuds-openharness-plugin-management-command-exposure

History

May 7, 2026 8:30 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:hkuds:openharness::::::::

Apr 22, 2026 3:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Apr 22, 2026 2:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Apr 22, 2026 12:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Hkuds Hkuds openharness
Vendors & Products		Hkuds Hkuds openharness

Apr 22, 2026 12:00 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		HKUDS OpenHarness prior to PR #156 remediation exposes plugin lifecycle commands including /plugin install, /plugin enable, /plugin disable, and /reload-plugins to remote senders by default. Attackers who gain access through the channel layer can remotely manage plugin trust and activation state, enabling unauthorized plugin installation and activation on the system.
Title		HKUDS OpenHarness Plugin Management Command Exposure
Weaknesses		CWE-276
References		https://github.com/HKUDS/OpenHarness/commit/59017e09880fcf9a6f60456a84fb982900b2c0b2 https://github.com/HKUDS/OpenHarness/pull/156 https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7 https://www.vulncheck.com/advisories/hkuds-openharness-plugin-management-command-exposure
Metrics		cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`