CVE•Published 2026-04-17•Modified 2026-04-24•1 article on news•6 live references•NVD data

CVE-2026-40516Hkuds · Openharness

Vulnerability data via NVD (ingested)

CVSS v3.1

8.3

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 89% of all CVEs

Weaknesses (CWE)

CWE-918Server-Side Request Forgery (SSRF)

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.

Timeline

Published 2026-04-17

Modified 2026-04-24

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-40516

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Hkuds Openharness"

All exposed Hkuds Openharness instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Openharness"

HTTP body or banner mentions "Openharness" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-40516