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 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.

CVSS 4.0

6.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:L

CVSS 3.1

8.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-25)

CWE

CWE-918

Published

2026-08-11

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• n8n:n8n

Packages (OSV)

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-vhf8-cg2h-cg3p
• https://www.vulncheck.com/advisories/n8n-before-ssrf-protection-bypass-via-mcp-client

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