n8n
How to Fix n8n Telegram Trigger Not Working: A 6-Step Diagnostic Checklist
Fix the n8n Telegram Trigger not firing: diagnose with getWebhookInfo, re-register the webhook, then check test URLs, privacy mode, and N8N_WEBHOOK_URL.
Self-Hosted
n8n
How to Migrate n8n from SQLite to PostgreSQL Without Losing Workflows
Migrate n8n from SQLite to PostgreSQL with the CLI: export entities, provision Postgres, repoint n8n via DB_POSTGRESDB_* variables, import, and verify.
n8n
How to Run n8n Code Nodes with External Task Runners in Docker
n8n 3.0 deprecated internal task runners. Set up external mode in Docker: the n8nio/runners sidecar compose file, auth token wiring, and Python allowlists.
n8n
Ni8mare (CVE-2026-21858): Patch n8n's CVSS 10.0 Webhook RCE and Rotate Your Credentials
Patch Ni8mare (CVE-2026-21858): upgrade self-hosted n8n to 1.121.0+ to fix the CVSS 10.0 webhook RCE, verify the fix, and rotate all exposed credentials.
n8n
n8n October 2026 Security Bulletin: Patch Guide for Self-Hosted Instances
n8n's October 14, 2026 security bulletin ships High-severity fixes. This guide maps each release line to its patch version and walks through a safe upgrade.
n8n
Fix n8n 'Connection Lost' Behind NGINX: WebSocket and Reverse Proxy Guide
Fix the n8n 'Connection lost' banner behind NGINX or Caddy: WebSocket upgrade passthrough, proxy buffering, N8N_PROXY_HOPS, and how to rule out memory crashes.
n8n
How to Fix n8n 'Webhook Not Registered' 404 Errors Behind a Reverse Proxy
Fix n8n's 404 'webhook is not registered' error: decode the message, set N8N_WEBHOOK_URL behind a reverse proxy, and fix Nginx headers and route-param paths.
n8n
n8n September 2026 Security Advisories: Patch Checklist for Self-Hosted Instances
n8n issued three advisory batches in September 2026, most without CVE IDs, so scanners miss them. This checklist maps each batch to its patch versions.
n8n
Fix n8n 'Database Not Ready': SQLite VACUUM Fix
Fix n8n's 'database not ready' error on SQLite: diagnose disk and database bloat, run VACUUM safely, tune execution pruning, and plan a PostgreSQL migration.
n8n
How to Fix Deprecated Nodes in n8n Before the 3.0 Upgrade
n8n 2.42.6 blocks saving workflows with deprecated nodes. Find every deprecated node, replace it, and migrate safely before the n8n 3.0 upgrade.