---
id: CVE-2026-65056
title: >-
  mcp-webresearch Server-Side Request Forgery in visit_page Due to Missing
  Internal-IP Filtering
summary: >-
  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 valida…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: mzxrai
product: mcp-webresearch
affected:
  - mcp-webresearch <= 0.1.7
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-22T14:59:19.107962Z'
exploitAvailable: true
published: '2026-07-21'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T14:18:13.254Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-65056'
references:
  - url: 'https://github.com/geo-chen/oss/blob/main/mcp-webresearch.md'
    label: Blog Post
  - url: 'https://www.npmjs.com/package/@mzxrai/mcp-webresearch'
    label: Product
  - url: >-
      https://www.vulncheck.com/advisories/mcp-webresearch-server-side-request-forgery-in-visit-page-due-to-missing-internal-ip-filtering
tags:
  - cve.org
  - exploit-available
epss: 0.00409
epssPercentile: 0.34886
ingestedAt: '2026-09-24T15:45:56.722Z'
---

## Overview

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.

## Affected

- `mcp-webresearch <= 0.1.7`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.