High severity · published Apr 21, 2026
CVE-2026-6823
HKUDS OpenHarness Insecure Default Remote Channel Allowlist
8.2
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenHarness · HKUDS
before PR #147 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6823
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6823
Patch
https://github.com/HKUDS/OpenHarness/commit/fab40c6eabfb15f2bdf23cddd3cfe66a64ea203d
Exploit
https://github.com/HKUDS/OpenHarness/pull/147
Release Notes
https://github.com/HKUDS/OpenHarness/releases/tag/v0.1.7
Third Party Advisory
https://www.vulncheck.com/advisories/hkuds-openharness-insecure-default-remote-channel-allowlist
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