---
title: "CVE-2026-104120: modelcontextprotocol mcp-server-fetch & mcp-server-everything - Server-Side Request Forgery"
description: "modelcontextprotocol mcp-server-fetch and mcp-server-everything <= 2026.6.4 contain a server-side request forgery caused by manipulation of the url/path argument in fetch_url function of Fetch Tool, letting remote attackers make arbitrary requests, exploit requires no special privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-104120/
---

# CVE-2026-104120 modelcontextprotocol mcp-server-fetch & mcp-server-everything - Server-Side Request Forgery

modelcontextprotocol mcp-server-fetch and mcp-server-everything <= 2026.6.4 contain a server-side request forgery caused by manipulation of the url/path argument in fetch\_url function of Fetch Tool, letting remote attackers make arbitrary requests, exploit requires no special privileges.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.29% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-104120)

## Details

Type

Server-Side Request Forgery

Impact

Server Side Request Forgery

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Published

2 October 2026

Updated

15 October 2026

Weakness

[CWE-918](https://cwe.mitre.org/data/definitions/918.html)

## Vendor fix

Update to a fixed version once the pull request is accepted or apply the patch; otherwise, update to the latest version when available.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-104120](https://nvd.nist.gov/vuln/detail/CVE-2026-104120)
- [https://github.com/modelcontextprotocol/servers/issues/4492](https://github.com/modelcontextprotocol/servers/issues/4492)
- [https://github.com/modelcontextprotocol/servers/pull/4890](https://github.com/modelcontextprotocol/servers/pull/4890)
- [https://vuldb.com/cve/CVE-2026-104120](https://vuldb.com/cve/CVE-2026-104120)
- [https://vuldb.com/submit/960099](https://vuldb.com/submit/960099)
- [https://vuldb.com/vuln/412764](https://vuldb.com/vuln/412764)
- [https://vuldb.com/vuln/412764/cti](https://vuldb.com/vuln/412764/cti)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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