HKUDS OpenHarness HTTP Service web_fetch/web_search server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k7.06

Summaryinfo

A vulnerability identified as critical has been detected in HKUDS OpenHarness. This issue affects the function web_fetch/web_search of the component HTTP Service. This manipulation causes server-side request forgery. This vulnerability is tracked as CVE-2026-40516. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in HKUDS OpenHarness (affected version not known) and classified as critical. Affected by this vulnerability is the function web_fetch/web_search of the component HTTP Service. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed by Chia Min Jun Lennon. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-40516 since 04/13/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch bd4df81f634f8c7cddcc3fdf7f561a13dcbf03ae is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-23452). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: bd4df81f634f8c7cddcc3fdf7f561a13dcbf03ae

Timelineinfo

04/13/2026 CVE reserved
04/17/2026 +4 days Advisory disclosed
04/17/2026 +0 days VulDB entry created
04/17/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Chia Min Jun Lennon
Status: Confirmed

CVE: CVE-2026-40516 (🔒)
GCVE (CVE): GCVE-0-2026-40516
GCVE (VulDB): GCVE-100-358087
EUVD: 🔒

Entryinfo

Created: 04/17/2026 18:47
Updated: 04/17/2026 19:16
Changes: 04/17/2026 18:47 (77), 04/17/2026 19:16 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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