Show HN: DepGuard, Visualize and simulate NPM vulnerability blast radiuses

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GitHub - EgglezosHub/DepGuard: DepGuard is a visual analysis tool that turns messy `npm` vulnerability lists into clear, interactive graphs. It helps developers find the "blast radius" of a vulnerability and prioritize fixes based on network structure, not just CVSS scores. · GitHub

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DepGuard

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DepGuard

Dependency Graph Analysis & Vulnerability Propagation Simulator

DepGuard is a full-stack web application designed to build, inspect, and simulate vulnerability propagation through npm dependency graphs. By parsing package-lock.json files or querying live packages, DepGuard visualizes structural risks and calculates the potential blast radius of compromised dependencies.

✨ Key Features

NPM Dependency Resolution: Recursively resolves dependency trees from a lockfile or directly from the npm registry.

Vulnerability Detection: Real-time CVE matching via the OSV (Open Source Vulnerabilities) API.

Interactive Graph Visualization: Built with Cytoscape.js to explore transitive dependencies, highlight exposure paths, and visualize a package's blast radius.

Smart Risk Scoring: Ranks vulnerabilities by combining CVSS severity scores with structural graph metrics (like betweenness centrality and reachability).

Built-in Caching: SQLite-backed async caching for rapid subsequent analyses and registry lookups.

🛠️ Tech Stack

Backend: Python, FastAPI, NetworkX (Graph Theory metrics), aiosqlite, HTTPX.

Frontend: React, TypeScript, Tailwind CSS, Cytoscape.js.

Quick start

# Backend — terminal 1<br>cd backend<br>python -m venv .venv<br>source .venv/bin/activate # macOS / Linux<br># .venv\Scripts\activate # Windows<br>pip install -e ".[dev]"<br>uvicorn app.main:app --reload # http://127.0.0.1:8000/docs

# Frontend — terminal 2<br>cd frontend<br>npm install<br>npm run dev # http://localhost:5173

About

DepGuard is a visual analysis tool that turns messy `npm` vulnerability lists into clear, interactive graphs. It helps developers find the "blast radius" of a vulnerability and prioritize fixes based on network structure, not just CVSS scores.

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MIT license

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TypeScript<br>58.1%

Python<br>38.8%

JavaScript<br>1.4%

Other<br>1.7%

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