CVE-2026-72768: 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…

PriorityP351high8.3CVSS 3.1

AVNACLPRLUINSUCHIHAL

EPSS

0.22%

13.5th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
n8n-io	n8n	< 2.32.1	2.32.1
n8n-io	n8n	< 2.31.5	2.31.5
n8n	n8n	—	—
n8n	n8n	>= 2.31.0 < 2.31.5	2.31.5

CVSS provenance

nvdv3.18.3HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

nvdv4.06.4MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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