Server-Side Request Forgery in OpenHarness Web Tools
CVE-2026-40516

7.8HIGH

Key Information:

Vendor

Hkuds

Status
Openharness
Vendor
CVE Published:
17 April 2026

What is CVE-2026-40516?

OpenHarness contains a server-side request forgery vulnerability affecting its web_fetch and web_search functionalities. This flaw enables attackers to manipulate parameters to access private HTTP services, including localhost and cloud metadata endpoints, by invoking these tools against non-public addresses without sufficient validation. As a result, responses from local development services and other sensitive resources can be exposed to unauthorized users, significantly impacting the security of affected systems.

Affected Version(s)

OpenHarness 0

References

https://github.com/HKUDS/OpenHarness/pull/92
issue-tracking
https://github.com/HKUDS/OpenHarness/commit/bd4df81f634f8...
patch
https://www.vulncheck.com/advisories/openharness-ssrf-via...
third-party-advisory

CVSS V4

Score:
7.8
Severity:
HIGH
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Chia Min Jun Lennon
.