CVE-2026-65056

mcp-webresearch 0.1.7 contains a server-side request forgery vulnerability that allows attackers to access internal network services by supplying loopback, link-local, or cloud metadata addresses to the visit_page tool, which only validates the URL protocol without filtering private or reserved IP ranges. Attackers can steer the LLM-controlled URL argument through prompt injection to navigate the server's Playwright browser to internal endpoints such as cloud instance metadata services, causing the server to return sensitive internal page content including credentials into the model context.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/geo-chen/oss/blob/main/mcp-webresearch.md
https://www.npmjs.com/package/@mzxrai/mcp-webresearch
https://www.vulncheck.com/advisories/mcp-webresearch-server-side-request-forgery-in-visit-page-due-to-missing-internal-ip-filtering
https://github.com/geo-chen/oss/blob/main/mcp-webresearch.md

Configurations

No configuration.

History

22 Jul 2026, 16:18

Type	Values Removed	Values Added
References	~~() https://github.com/geo-chen/oss/blob/main/mcp-webresearch.md -~~	() https://github.com/geo-chen/oss/blob/main/mcp-webresearch.md -

21 Jul 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-21 21:16

Updated : 2026-07-23 15:24

NVD link : CVE-2026-65056

Mitre link : CVE-2026-65056

CVE.ORG link : CVE-2026-65056

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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