n8n Sandbox Escape Lets Workflow Editors Run OS Commands as the n8n Process

n8n has patched a high-severity expression-sandbox escape that could let an authenticated workflow editor execute operating-system commands on the server running the automation platform. Security Joes found the flaw while probing n8n's February fix for CVE-2026-27577 for another bypass. The affected ranges are 2.31.5 a