| Component | n8n |
| Severity | high (CVSS 8.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
| Published (NVD) | 2026-08-11 |
| Last modified | 2026-09-01 |
| Affected versions | n8n >= 2.31.0, < 2.31.5 n8n = 2.32.0 |
| Fixed in | 2.31.5 |
| Weakness | CWE-918 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
2.31.5or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-72768
- 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
Read more
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