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    CVE-2026-40516

    OpenHarness before commit bd4df81 contains a server-side request forgery vulnerability in the web_fetch and web_search tools that allows attackers to access private and localhost HTTP services by manipulating tool parameters without proper validation of target addresses. Attackers can influence an agent session to invoke these tools against loopback, RFC1918, link-local, or other non-public addresses to read response bodies from local development services, cloud metadata endpoints, admin panels, or other private HTTP services reachable from the victim host.

    Published:Apr 17, 2026
    Last Modified:Apr 24, 2026
    EPS:Apr 17, 2026
    EPSS Score:0.00047
    CVSS Score:8.3

    Affected Products

    Vendor
    Hkuds
    Product
    Openharness

    Exploits

    https://github.com/HKUDS/OpenHarness/pull/92https://github.com/HKUDS/OpenHarness/pull/92

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    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-2026-6729 (CVSS 5.3) — HKUDS OpenHarness prior to PR #159 remediation contains a session key derivation vulnerability that allows aut…
    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