CVE-2026-72768

n8n before 2.32.1 SSRF Protection Bypass via MCP Client

State: Published
Severity: 6.4 Medium
Published: Aug 11, 2026
Updated: Oct 29, 2026
Reserved: Aug 10, 2026

Description

n8n versions before 2.32.1 contain a server-side request forgery protection bypass vulnerability in the MCP Client node that allows authenticated users to bypass SSRF protections. Attackers can craft workflows that send requests to internal or blocked hosts without routing through SSRF protection, exposing internal services and reading responses back through the workflow.

Scores

CVSS	Score	Vector	Source
4.0	6.4 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:L	VulnCheck

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
n8nn8n-io	2.32.0 to before 2.32.1Affected 2.32.1Not affected
n8nn8n-io	before 2.31.5Affected 2.31.5Not affected

References

GitHub Security Advisory (GHSA-vhf8-cg2h-cg3p)vendor-advisory
VulnCheck Advisory: n8n before 2.32.1 SSRF Protection Bypass via MCP Clientthird-party-advisory

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