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CVE-2026-6729— HKUDS OpenHarness Session Key Collision Privilege Escalation

Quick assessment

Affected
HKUDS OpenHarness
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenHarness是Data Intelligence Lab@HKU开源的一个轻量级智能体开发与运行框架。 OpenHarness存在安全漏洞，该漏洞源于会话密钥派生问题，可能导致经过身份验证的参与者通过利用缺乏发送方身份验证的共享ohmo会话密钥来劫持其他用户的会话。

CVSS 6.3 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
HKUDS OpenHarness < PR #159 affected
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I. Basic Information for CVE-2026-6729

Vulnerability Information
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Vulnerability Title
HKUDS OpenHarness Session Key Collision Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenHarness 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenHarness是Data Intelligence Lab@HKU开源的一个轻量级智能体开发与运行框架。 OpenHarness存在安全漏洞，该漏洞源于会话密钥派生问题，可能导致经过身份验证的参与者通过利用缺乏发送方身份验证的共享ohmo会话密钥来劫持其他用户的会话。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HKUDS OpenHarness 0 ~ PR #159 -

II. Public POCs for CVE-2026-6729

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III. Intelligence Information for CVE-2026-6729

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Patches & Fixes for CVE-2026-6729 (2)

Vendor Advisories for CVE-2026-6729 (1)

IV. Related Vulnerabilities

Same product: OpenHarness
Same vendor: HKUDS
Same weakness: CWE-287