CVE-2026-40516

HIGH SEVERITY

CVSS Score & Metrics

Base Score

8.3 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L                                    

Vulnerability Description

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 Details

Published Date

April 17, 2026

Last Modified

April 17, 2026

CWE ID

CWE-918

Source

NVD

Vendor

HKUDS

Product

OpenHarness

External References

https://github.com/HKUDS/OpenHarness/commit/bd4df81f634f8c7cddcc3fdf7f561a13dcbf03ae
https://github.com/HKUDS/OpenHarness/pull/92
https://www.vulncheck.com/advisories/openharness-ssrf-via-web-fetch-and-web-search
https://github.com/HKUDS/OpenHarness/pull/92

CVE-2026-40516

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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