🛡️ NPM Safety Guard — All 23 Security Layers Explained

Every npm project is one malicious package away from a supply-chain breach. NPM Safety Guard catches threats that npm audit completely misses — from DPRK backdoors and typosquatted packages, to exposed API keys and AI credential theft hidden inside your node_modules. This video walks through all 23 detection layers, one by one, showing exactly what each layer catches and how it protects your project in real time. 🛡️ Intro NPM Safety Guard is the most comprehensive npm security scanner for developers. It ships as a VS Code extension (also works in Cursor and Windsurf) and a JetBrains plugin (WebStorm, IntelliJ IDEA, and all IntelliJ-based IDEs). It runs silently in the background and alerts you to supply-chain threats, malware, CVEs, and credential leaks — before they can cause damage. Layer 1 — Known Malicious Packages Checks every package in your package.json against a bundled database of documented supply-chain attacks, including DPRK/Lazarus Group backdoors, the infamous event-stream compromise, and dozens of other confirmed malicious packages. The database is also synced against a live remote feed so newly discovered threats are caught even before you update the extension. Layer 2 — CVE Vulnerabilities Queries the Google OSV.dev API for known CVEs across all your direct dependencies. No API key needed — it is completely free. Results are cached for 24 hours to minimize network calls. CVSS scores are mapped to severity levels (Critical, High, Medium, Low) so you always know exactly how serious each vulnerability is and which version fixes it. Layer 3 — Install Script Hooks Flags packages that declare preinstall, postinstall, install, or prepare npm scripts. These hooks run automatically during npm install — before any of your own code executes — making them the number one real-world vector for supply-chain malware delivery. Legitimate packages that genuinely need install scripts (like node-gyp and imagemin) are automatically whitelisted. Layer 4 — Deep Tarball AS