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Vulnerability · Published Oct 2, 2026 · Assigned by VulDB

CVE-2026-104120modelcontextprotocol mcp-server-fetch/mcp-server-everything Fetch Tool server.py fetch_url server-side request forgery

High 7.3

In plain English

A high-severity server-side request forgery in mcp-server-everything from modelcontextprotocol. 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).

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.3%top 78.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A security vulnerability has been detected in modelcontextprotocol mcp-server-fetch and mcp-server-everything up to 2026.6.4. Affected is the function fetch_url of the file mcp_server_fetch/server.py of the component Fetch Tool. The manipulation of the argument url/path leads to server-side request forgery. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The pull request to fix this issue awaits acceptance.

Affected products (as reported)

VendorProductVersions
modelcontextprotocol mcp-server-fetch 2026.6.02026.6.12026.6.22026.6.32026.6.4
modelcontextprotocol mcp-server-everything 2026.6.02026.6.12026.6.22026.6.32026.6.4

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

References