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

Quick assessment

Affected
modelcontextprotocol mcp-server-fetch
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 modelcontextprotocol 的 mcp-server-fetch 和 mcp-server-everything（版本最高至 2026.6.4）中检测到一个安全漏洞。受影响的是组件“Fetch Tool”中文件 mcp_server_fetch/server.py 的 fetch_url 函数。通过操纵参数 url/path，可导致服务端请求伪造（SSRF）。该漏洞可由远程攻击者发起利用。相关利用方法已公开披露，存在被实际利用的风险。目前，修复该问题的拉取请求（Pull Request）仍在等待审

CVSS 7.3 · High EPSS 0.29% · P19

Affected Version Matrix 10

VendorProduct Version RangeStatus
modelcontextprotocol mcp-server-everything 2026.6.0 affected
2026.6.1 affected
2026.6.2 affected
2026.6.3 affected
2026.6.4 affected
modelcontextprotocol mcp-server-fetch 2026.6.0 affected
2026.6.1 affected
2026.6.2 affected
2026.6.3 affected
2026.6.4 affected
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I. Basic Information for CVE-2026-104120

Vulnerability Information
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Vulnerability Title
modelcontextprotocol mcp-server-fetch/mcp-server-everything Fetch Tool server.py fetch_url server-side request forgery
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
modelcontextprotocol mcp-server-fetch 2026.6.0 cpe:2.3:a:modelcontextprotocol:mcp-server-fetch:*:*:*:*:*:*:*:*
modelcontextprotocol mcp-server-everything 2026.6.0 cpe:2.3:a:modelcontextprotocol:mcp-server-everything:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-104120

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III. Intelligence Information for CVE-2026-104120

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Patches & Fixes for CVE-2026-104120 (1)

Vendor Advisories for CVE-2026-104120 (1)

IV. Related Vulnerabilities

Same vendor: modelcontextprotocol
Same weakness: CWE-918

V. Comments for CVE-2026-104120

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