SSRF in Hkuds Openharness
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.002 (7.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.
Affected products
- Hkuds Openharness — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (issue-tracking, Exploit, Issue Tracking)
- disclosure@vulncheck.com (Patch, patch)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-40516?
- CVE-2026-40516 is a high-severity vulnerability in Hkuds Openharness, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.3/10. Published 2026-04-17.
- How severe is CVE-2026-40516?
- High severity. CVSS v3 base score is 8.3 out of 10.