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
References4
- github.com/HKUDS/OpenHarness/commit/3186851c479ee714a9bb9aa6cd7… Patch
- github.com/HKUDS/OpenHarness/pull/159 ExploitIssue Tracking
- github.com/HKUDS/OpenHarness/pull/159 ExploitIssue Tracking
- www.vulncheck.com/advisories/hkuds-openharness-session-key-coll… Third Party Advisory
Metrics
- CVSS 3.1
-
7.6
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L - CVSS 4.0
-
5.3
MEDIUM
Score source: CNA
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:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 10 · as of 13 November 2026
- CWE
- CWE-287
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