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Vulnerability record · CVE-2026-6729 · published 20 April 2026

CVE-2026-6729: Hkuds openharness improper authentication vulnerability

Hkuds · Openharness

HKUDS OpenHarness prior to PR #159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse another user's conversation state and replace or interrupt their active tasks by colliding into the same session boundary through the shared chat or thread scope.

5.3 CVSS 4.0 Medium EPSS 0.35% · top 74.6% CWE-287 · Improper authentication
5.3CVSS 4.0 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

HKUDS OpenHarness prior to PR #159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse another user's conversation state and replace or interrupt their active tasks by colliding into the same session boundary through the shared chat or thread scope.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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/3186851c479ee714a9bb9aa6cd77017db7e589e2 Patch
https://github.com/HKUDS/OpenHarness/pull/159 ExploitIssue Tracking
https://www.vulncheck.com/advisories/hkuds-openharness-session-key-collision-privilege-escalation Third Party Advisory
https://github.com/HKUDS/OpenHarness/pull/159 ExploitIssue Tracking

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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%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%7.5CVE-2026-42018JFrog Artifactory improper authentication leaks anonymous tokenJFrog Artifactory can return an internal anonymous-user token to an unauthenticated caller even when anonymous access is disabled. Because the token …KEVEPSS 9.8%analysed

Source: NIST National Vulnerability Database (record CVE-2026-6729), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.