n8n
How to Harden Self-Hosted n8n for Teams After the October 2026 Security Advisories
Harden a shared self-hosted n8n instance after the October 2026 advisories: patch to 2.44.1, scope credentials by project, and lock nodes, files, and API keys.
Security
n8n
n8n API Key Variable Scopes Tutorial: Least-Privilege Keys for Instance Variables
Give an n8n API key only the variable scopes it needs: create a scoped key, test variable list and create calls with curl, and fix 403 scope errors fast.
n8n
n8n External Secrets Tutorial: Connect HashiCorp Vault and AWS Secrets Manager
Connect n8n to external secret stores with hands-on HashiCorp Vault and AWS Secrets Manager walkthroughs, $secrets expressions, and per-project vault scoping.
claude-code
Claude Code Hooks Fail Closed: onFailure "block" Tutorial for Guard Hooks
Claude Code v2.1.295 added onFailure: block to close the fail-open trap in guard hooks: config, timeout tuning, and the Cursor/Codex/Gemini CLI comparison.
MCP
MCP Postgres Server Tutorial: Safe Read-Only Database Access for AI Agents (2026)
Install Postgres MCP Pro in restricted mode behind a least-privilege read-only role: safe AI access to PostgreSQL, each step tested on a live database.