CVE-2026-104120
6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| modelcontextprotocol | mcp-server-fetch | 2026.6.0 | affected |
| modelcontextprotocol | mcp-server-fetch | 2026.6.1 | affected |
| modelcontextprotocol | mcp-server-fetch | 2026.6.2 | affected |
| modelcontextprotocol | mcp-server-fetch | 2026.6.3 | affected |
| modelcontextprotocol | mcp-server-fetch | 2026.6.4 | affected |
| modelcontextprotocol | mcp-server-everything | 2026.6.0 | affected |
| modelcontextprotocol | mcp-server-everything | 2026.6.1 | affected |
| modelcontextprotocol | mcp-server-everything | 2026.6.2 | affected |
| modelcontextprotocol | mcp-server-everything | 2026.6.3 | affected |
| modelcontextprotocol | mcp-server-everything | 2026.6.4 | affected |
Weaknesses
- CWE-918: Server-Side Request Forgery
References
- https://vuldb.com/vuln/412764
- https://vuldb.com/vuln/412764/cti
- https://vuldb.com/cve/CVE-2026-104120
- https://vuldb.com/submit/960099
- https://github.com/modelcontextprotocol/servers/issues/4492
- https://github.com/modelcontextprotocol/servers/pull/4890
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