CVE-2026-65056 | mcp-webresearch 0.1.7 contains a server-side request forgery… | CVSS 8.2 HIGH

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.

Metadata

CVE ID: CVE-2026-65056
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-21 14:05 UTC
Published: 2026-07-21 20:48 UTC
Last updated: 2026-07-21 20:48 UTC
Primary CWE: CWE-918
Server-Side Request Forgery (SSRF)
Vendor / Product: mzxrai / mcp-webresearch
Sources: cve.org · NVD

Severity & Metrics

8.2 HIGH CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
mzxrai	mcp-webresearch	—	0 ≤ 0.1.7

Weakness (CWE)

CWE	Source	Description
CWE-918	cna	Server-Side Request Forgery (SSRF)

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.3	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
8.2	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

References (3)