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    CVE-2026-6729

    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:Apr 20, 2026
    Last Modified:Apr 24, 2026
    EPS:Apr 20, 2026
    EPSS Score:0.00034
    CVSS Score:6.3

    Affected Products

    Vendor
    Hkuds
    Product
    Openharness

    Exploits

    https://github.com/HKUDS/OpenHarness/pull/159https://github.com/HKUDS/OpenHarness/pull/159

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

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    CVE-2026-7551 (CVSS 8.7) — HKUDS OpenHarness contains a remote code execution vulnerability in the /bridge slash command that allows remo…
    CVE-2026-6823 (CVSS 8.3) — HKUDS OpenHarness prior to PR #147 remediation contains an insecure default configuration vulnerability where …
    CVE-2026-6819 (CVSS 8.7) — HKUDS OpenHarness prior to PR #156 remediation exposes plugin lifecycle commands including /plugin install, /p…
    CVE-2026-40516 (CVSS 7.8) — OpenHarness before commit bd4df81 contains a server-side request forgery vulnerability in the web_fetch and we…
    CVE-2026-40515 (CVSS 8.7) — OpenHarness before commit bd4df81 contains a permission bypass vulnerability that allows attackers to read sen…
    CVE-2026-40502 (CVSS 8.7) — OpenHarness prior to commit dd1d235 contains a command injection vulnerability that allows remote gateway user…
    CVE-2026-40503 (CVSS 7.1) — OpenHarness prior to commit dd1d235 contains a path traversal vulnerability that allows remote gateway users w…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High