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CVE-2026-40516

7.8 high SSVC exploitation: poc Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.8 · hkudsNVD modified 2026-10-26 21:10

Affected (CPE criteria) 1

  • cpe:2.3:a:hkuds:openharness:*:*:*:*:*:*:*:*

References 4