Is CVE-2026-104120 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-104120?

CVE-2026-104120 has a CVSS v3 severity of HIGH (7.3).

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CVE-2026-104120

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.