CVE-2026-104120

HIGH 7.3

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

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	modelcontextprotocol
Product	mcp-server-fetch
Published	Oct 2, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

modelcontextprotocol / mcp-server-fetch

2026.6.0 2026.6.1 2026.6.2 2026.6.3 2026.6.4

modelcontextprotocol / mcp-server-everything

2026.6.0 2026.6.1 2026.6.2 2026.6.3 2026.6.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 geochen (VulDB User) VulDB CNA Team