← Vulnerability feed

Vulnerability record · CVE-2026-6819 · published 21 April 2026

CVE-2026-6819: Hkuds openharness incorrect default permissions vulnerability

Hkuds · Openharness

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.

8.7 CVSS 4.0 High EPSS 0.52% · top 58.5% CWE-276 · Incorrect default permissions
8.7CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/HKUDS/OpenHarness/commit/59017e09880fcf9a6f60456a84fb982900b2c0b2 Patch
https://github.com/HKUDS/OpenHarness/pull/156 ExploitIssue TrackingPatch
https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7 Release Notes
https://www.vulncheck.com/advisories/hkuds-openharness-plugin-management-command-exposure Third Party Advisory
https://github.com/HKUDS/OpenHarness/pull/156 ExploitIssue TrackingPatch

Track CVE-2026-6819 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-7551Hkuds openharness os command injection vulnerabilityHKUDS OpenHarness contains a remote code execution vulnerability in the /bridge slash command that allows remote senders accepted by configuration to…EPSS 1.0%8.7CVE-2026-40515Hkuds openharness incorrect authorization vulnerabilityOpenHarness before commit bd4df81 contains a permission bypass vulnerability that allows attackers to read sensitive files by exploiting incomplete p…EPSS 0.36%8.7CVE-2026-40502Hkuds openharness missing authorization vulnerabilityOpenHarness prior to commit dd1d235 contains a command injection vulnerability that allows remote gateway users with chat access to invoke sensitive …EPSS 2.1%8.3CVE-2026-6823Hkuds openharness incorrect default permissions vulnerabilityHKUDS OpenHarness prior to PR #147 remediation contains an insecure default configuration vulnerability where remote channels inherit allow_from = ["…EPSS 0.58%7.8CVE-2026-40516Hkuds openharness server-side request forgery (ssrf) vulnerabilityOpenHarness before commit bd4df81 contains a server-side request forgery vulnerability in the web_fetch and web_search tools that allows attackers to…EPSS 0.29%7.1CVE-2026-40503Hkuds openharness path traversal vulnerabilityOpenHarness prior to commit dd1d235 contains a path traversal vulnerability that allows remote gateway users with chat access to read arbitrary files…EPSS 0.46%5.3CVE-2026-6729Hkuds openharness improper authentication vulnerabilityHKUDS OpenHarness prior to PR #159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats…EPSS 0.35%7.8CVE-2026-87886Acronis Backup plugins for cPanel, Plesk and DirectAdmin local privilege escalationAcronis Backup plugins for cPanel & WHM, Plesk and DirectAdmin on Linux ship with insecure file permissions (CWE-276), allowing a local user to escal…KEVEPSS 0.23%analysed

Source: NIST National Vulnerability Database (record CVE-2026-6819), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.