Vulnerability · Published Jul 21, 2026 · Assigned by VulnCheck
CVE-2026-65056mcp-webresearch Server-Side Request Forgery in visit_page Due to Missing Internal-IP Filtering
High 8.2
In plain English
A high-severity server-side request forgery in mcp-webresearch from mzxrai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Official description
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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| mzxrai | mcp-webresearch | 0 – through 0.1.7 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N