HKUDS OpenHarness Session Key Collision Privilege Escalation_CVE-2026-6729

5.3 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-6729

Source VulnCheck

Published Apr 20, 2026 at 22:01

Affected Product

Vendor HKUDS

Product OpenHarness

Affected Versions HKUDS OpenHarness 0

CWE Classification

CWE-287

References

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    "lastseen": "",
    "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.",
    "published": "2026-04-20T22:01:38.766Z",
    "modified": "2026-04-20T22:01:38.766Z",
    "type": "cve",
    "title": "HKUDS OpenHarness Session Key Collision Privilege Escalation",
    "source": "VulnCheck",
    "references": "https://github.com/HKUDS/OpenHarness/pull/159\nhttps://github.com/HKUDS/OpenHarness/commit/3186851c479ee714a9bb9aa6cd77017db7e589e2\nhttps://www.vulncheck.com/advisories/hkuds-openharness-session-key-collision-privilege-escalation",
    "id": "CVE-2026-6729",
    "bulletinFamily": "",
    "cwe": [
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    "cvelist": null,
    "sourceData": "HKUDS OpenHarness 0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "OpenHarness",
    "version": "0",
    "vendor": "HKUDS",
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