CVE-2026-6823
HKUDS OpenHarness Insecure Default Remote Channel Allowlist
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.
INFO
Published Date :
April 21, 2026, 9:16 p.m.
Last Modified :
May 7, 2026, 8:29 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update OpenHarness to version PR #147 or newer.
- Restrict remote channel access to authorized senders.
- Review and tighten access controls for remote channels.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-6823.
| URL | Resource |
|---|---|
| https://github.com/HKUDS/OpenHarness/commit/fab40c6eabfb15f2bdf23cddd3cfe66a64ea203d | Patch |
| https://github.com/HKUDS/OpenHarness/pull/147 | Exploit Issue Tracking Patch |
| 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 | Exploit Issue Tracking Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-6823 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-6823
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-6823 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-6823 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 07, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:hkuds:openharness:*:*:*:*:*:*:*:* versions up to (excluding) 0.1.7 Added Reference Type VulnCheck: https://github.com/HKUDS/OpenHarness/commit/fab40c6eabfb15f2bdf23cddd3cfe66a64ea203d Types: Patch Added Reference Type VulnCheck: https://github.com/HKUDS/OpenHarness/pull/147 Types: Exploit, Issue Tracking, Patch Added Reference Type VulnCheck: https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7 Types: Release Notes Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/hkuds-openharness-insecure-default-remote-channel-allowlist Types: Third Party Advisory Added Reference Type CISA-ADP: https://github.com/HKUDS/OpenHarness/pull/147 Types: Exploit, Issue Tracking, Patch -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 22, 2026
Action Type Old Value New Value Added Reference https://github.com/HKUDS/OpenHarness/pull/147 -
New CVE Received by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 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:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N Added CWE CWE-276 Added Reference https://github.com/HKUDS/OpenHarness/commit/fab40c6eabfb15f2bdf23cddd3cfe66a64ea203d Added Reference https://github.com/HKUDS/OpenHarness/pull/147 Added Reference https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7 Added Reference https://www.vulncheck.com/advisories/hkuds-openharness-insecure-default-remote-channel-allowlist