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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Hkuds | Openharness | < 2026-04-11 |
Related Weaknesses (CWE)
References
- https://github.com/HKUDS/OpenHarness/commit/bd4df81f634f8c7cddcc3fdf7f561a13dcbfPatch
- https://github.com/HKUDS/OpenHarness/pull/92ExploitIssue Tracking
- https://www.vulncheck.com/advisories/openharness-ssrf-via-web-fetch-and-web-searThird Party Advisory
- https://github.com/HKUDS/OpenHarness/pull/92ExploitIssue Tracking
FAQ
What is CVE-2026-40516?
CVE-2026-40516 is a vulnerability with a CVSS score of 8.3 (HIGH). 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 mani...
How severe is CVE-2026-40516?
CVE-2026-40516 has been rated HIGH with a CVSS base score of 8.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40516?
Check the references section above for vendor advisories and patch information. Affected products include: Hkuds Openharness.