What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-02 · updated 2026-10-06
• Weakness: CWE-918

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

• modelcontextprotocol mcp-server-everything: 2026.6.0, 2026.6.1, 2026.6.2, 2026.6.3, 2026.6.4
• modelcontextprotocol mcp-server-fetch: 2026.6.0, 2026.6.1, 2026.6.2, 2026.6.3, 2026.6.4

References

• https://github.com/modelcontextprotocol/servers/issues/4492
• https://github.com/modelcontextprotocol/servers/pull/4890
• https://vuldb.com/cve/CVE-2026-104120
• https://vuldb.com/submit/960099
• https://vuldb.com/vuln/412764
• https://vuldb.com/vuln/412764/cti

Get alerted when CVE-2026-104120 or the next vulnerability affects your stack