CVE-2026-40516
8.3 · HIGHOverview
CVE-2026-40516 is a high-severity vulnerability affecting hkuds openharness. It was published on April 17, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from hkuds. Update openharness to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| hkuds | openharness | >= 0, < 2026-04-11 | Affected |
Frequently Asked Questions
What is CVE-2026-40516?
CVE-2026-40516 is a high-severity vulnerability affecting hkuds openharness. It was published on April 17, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).
How severe is CVE-2026-40516?
This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-40516?
Check the references section for vendor advisories and patches from hkuds. Update openharness to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-40516?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-40516 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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