What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-20 · updated 2026-10-25
• Weakness: CWE-287

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.

Affected products

• HKUDS OpenHarness: before 0.1.7 — fixed in 0.1.7

How to fix

Upgrade to a fixed version: HKUDS OpenHarness 0.1.7. Check the vendor advisory for mitigations.

References

• https://github.com/HKUDS/OpenHarness/commit/3186851c479ee714a9bb9aa6cd77017db7e589e2
• https://github.com/HKUDS/OpenHarness/pull/159
• https://www.vulncheck.com/advisories/hkuds-openharness-session-key-collision-privilege-escalation
• https://github.com/HKUDS/OpenHarness/pull/159

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