n8n MCP Client node SSRF protection bypass (CVE-2026-72768)

high severity · published 2026-08-11

An authenticated user can craft workflows whose requests skip SSRF protections and reach internal or blocked hosts. Responses come back through the workflow, exposing internal services and their data.

Fixed in: 2.31.5

CVE: CVE-2026-72768

Source: NVD

Am I affected?

You are affected if the installed version is older than 2.31.5. Check the version you have and update to 2.31.5 or later. The fixed version is verified against a vendor or advisory source.

Get the fix

FixLane has a reviewed fix procedure for this incident: a read-only check first, then the fix. Ask the Telegram bot, or connect an AI agent to the FixLane MCP server and call get_fix_prompt with incident id 143 and your operating system.