Top SECURITY GitHub Repositories & Tools (2026)

A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more.

Hunt down social media accounts by username across social networks

π RuView turns commodity WiFi signals into real-time spatial intelligence, vital sign monitoring, and presence detection — all without a single pixel of video.

A list of useful payloads and bypass for Web Application Security and Pentest/CTF

JSON.parse with hard limits on nesting depth, key count, string length and input size. Refuses parser bombs before they are allocated.

Get Android app updates straight from the source.

Node fetch with hard size, compression-ratio and time limits. Stops gzip bombs mid-stream.

Open-source IDS/IPS, WAF and bot detection for Linux, Windows, Docker and Kubernetes, with a crowdsourced blocklist of malicious IPs.

Linux sandboxing that doesn't get in your way

Free Windows, Mac and Linux cleaner, scanner, and more.

A high performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar

Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

The best IP Toolbox. Check your IP address & geolocation, test IP for WebRTC and DNS IP leaks, run an IP quality check, browser fingerprint check, website availability check, network speed test, global latency test, MTR test, Whois search, and more.

Coverage, security and code quality for coding agents

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

Free and Open Source Reverse Engineering Platform powered by rizin

The ZAP by Checkmarx Core project

awesome game security [Welcome to PR]

agent runtime security - zero trust, zero setup, zero latency.

Vulnerability scanner written in Go which uses the data provided by https://osv.dev