CVE-2026-6729 (GCVE-0-2026-6729)
Vulnerability from cvelistv5 – Published: 2026-04-20 22:01 – Updated: 2026-11-08 14:08
VLAI
EPSS
VEX
Title
HKUDS OpenHarness Session Key Collision Privilege Escalation
Summary
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.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-21 17:39 UTC
CWE
- CWE-287 - Improper Authentication (CWE-287)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/HKUDS/OpenHarness/pull/159 | issue-trackingpatch |
| https://github.com/HKUDS/OpenHarness/commit/31868… | patch |
| https://www.vulncheck.com/advisories/hkuds-openha… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| HKUDS | OpenHarness |
Affected:
0 , < PR #159
(git)
cpe:2.3:a:hkuds:openharness:*:*:*:*:*:*:*:* |
Date Public
2026-04-20 22:00
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.