High severity · published Apr 21, 2026
CVE-2026-6819
HKUDS OpenHarness Plugin Management Command Exposure
8.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenHarness · HKUDS
before PR #156 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6819
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6819
Patch
https://github.com/HKUDS/OpenHarness/commit/59017e09880fcf9a6f60456a84fb982900b2c0b2
Exploit
https://github.com/HKUDS/OpenHarness/pull/156
Release Notes
https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7
Third Party Advisory
https://www.vulncheck.com/advisories/hkuds-openharness-plugin-management-command-exposure
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