GHSA-vpcf-gvg4-6qwr: n8n: Expression Sandbox Escape Leads to RCE

n8n, a workflow automation tool, has a vulnerability where authenticated users with permission to create or modify workflows can exploit expression evaluation (the process of interpreting code within workflow parameters) to execute arbitrary system commands on the host server. This is a serious security flaw because it allows attackers to run unintended commands on the underlying system.