Introduction

n8n has become a popular open-source workflow automation platform due to its flexibility, extensibility, and self-hosted deployment model. However, like any web-based automation tool that integrates deeply with external services, APIs, and credentials, n8n presents a non-trivial attack surface. Recent vulnerability disclosures and misconfiguration incidents have highlighted the importance of securing n8n deployments, especially in self-hosted environments.

This article examines common n8n vulnerability classes, real-world risk scenarios, and practical mitigation strategies for production deployments. From an attacker’s perspective, n8n is attractive because it often stores:

API tokens and OAuth credentials

Database access secrets

Cloud provider keys

Internal service endpoints

Business logic embedded in workflows

A compromised n8n instance can effectively become a pivot point for lateral movement across infrastructure and SaaS platforms.