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Vulnerability record · CVE-2026-6823 · published 21 April 2026

CVE-2026-6823: Hkuds openharness incorrect default permissions vulnerability

Hkuds · Openharness

HKUDS OpenHarness prior to PR #147 remediation contains an insecure default configuration vulnerability where remote channels inherit allow_from = ["*"] permitting arbitrary remote senders to pass admission checks. Attackers who can reach the configured channel can bypass access controls and reach host-backed agent runtimes, potentially leading to unauthorized file disclosure and read access through default-enabled read-only tools.

8.3 CVSS 4.0 High EPSS 0.58% · top 54.6% CWE-276 · Incorrect default permissions
8.3CVSS 4.0 base score
0.58%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 #147 remediation contains an insecure default configuration vulnerability where remote channels inherit allow_from = ["*"] permitting arbitrary remote senders to pass admission checks. Attackers who can reach the configured channel can bypass access controls and reach host-backed agent runtimes, potentially leading to unauthorized file disclosure and read access through default-enabled read-only tools.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/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/fab40c6eabfb15f2bdf23cddd3cfe66a64ea203d Patch
https://github.com/HKUDS/OpenHarness/pull/147 ExploitIssue TrackingPatch
https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7 Release Notes
https://www.vulncheck.com/advisories/hkuds-openharness-insecure-default-remote-channel-allowlist Third Party Advisory
https://github.com/HKUDS/OpenHarness/pull/147 ExploitIssue TrackingPatch

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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-2026-6819Hkuds openharness incorrect default permissions vulnerabilityHKUDS OpenHarness prior to PR #156 remediation exposes plugin lifecycle commands including /plugin install, /plugin enable, /plugin disable, and /rel…EPSS 0.52%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%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-2026-6823), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.