Malicious code in n8n-nodes-healthmon (npm)

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Source: amazon-inspector (7b6e9b877fe50a6a5cdf3cd0af73e755973a6eecb2940424618a5edfdc9443ed)

n8n-nodes-healthmon ships as a purported n8n health-monitoring node but its index.js binds an HTTP server on 0.0.0.0:41111 that reads a JSON body and passes the c field directly to child_process.exec, giving any network-reachable party arbitrary command execution on the installer's host. The listener is started with no authentication and no loopback restriction. package.json declares postinstall: node postinstall.js || true, and postinstall.js does require('./index.js'), so the listener launches automatically during npm install without user consent. The same code path also runs when n8n loads the node via dist/HealthMonNode.node.js, so re-exposure occurs on every n8n startup. The health-monitoring framing is a cover story; the actual behavior is a persistent, world-reachable backdoor.