TI-2026-66050 Aliases CVE-2026-104120 GHSA-v78q-44mm-wf7q

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

HIGH 70CWE-918Published 2026-10-02 · Updated 2026-10-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00288 21st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MLflow	mcp-server-fetch	2026.6.0; 2026.6.1; 2026.6.2; 2026.6.3; 2026.6.4	—	No fix listed	CNA
MLflow	mcp-server-everything	2026.6.0; 2026.6.1; 2026.6.2; 2026.6.3; 2026.6.4	—	No fix listed	CNA

mcp-server-fetch VendorMLflow Affected 2026.6.0; 2026.6.1; 2026.6.2; 2026.6.3; 2026.6.4 Fixed in — No fix listed CNA
mcp-server-everything VendorMLflow Affected 2026.6.0; 2026.6.1; 2026.6.2; 2026.6.3; 2026.6.4 Fixed in — No fix listed CNA

CPE names CNA · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:modelcontextprotocol:mcp-server-fetch::::::::	—	—	—
cpe:2.3:a:modelcontextprotocol:mcp-server-everything::::::::	—	—	—

cpe:2.3:a:modelcontextprotocol:mcp-server-fetch:*:*:*:*:*:*:*:* Versions — — ·—
cpe:2.3:a:modelcontextprotocol:mcp-server-everything:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-104120
2026-10-03 Alias added: GHSA-v78q-44mm-wf7q
2026-10-06 CISA SSVC decision points changed
2026-10-06 Priority changed: LOW → HIGH

References

Exploit 1

https://github.com/modelcontextprotocol/servers/issues/4492

Patch 1

https://github.com/modelcontextprotocol/servers/pull/4890

TI-2026-46366 Server-side request forgery in mlflow KEVCVSS 3.1CRITICAL 9.3
TI-2023-03518 Absolute Path Traversal in mlflow/mlflow CVSS 3.1CRITICAL 10.0
TI-2023-01113 Path Traversal: '\..\filename' in mlflow/mlflow CVSS 3.1CRITICAL 9.8
TI-2025-31759 Redis Lua Use-After-Free may lead to remote code execution CVSS 3.1CRITICAL 10.0
TI-2026-81527 Code execution via scorer deserialization in MLflow servers CVSS 3.1CRITICAL 9.8
TI-2025-14028 Command Injection in mlflow/mlflow CVSS 3.1CRITICAL 10.0

See all 175 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences