Cybersecurity GitHub Repositories (2026) · Open Source Tools

Realm is a cross platform Red Team engagement platform with a focus on automation and reliability.

🐛 Advanced web vulnerability scanner with 5-rule false-positive reduction, WAF evasion, and modern HTML reports

Agent-less vulnerability scanner for Linux, FreeBSD, Container, WordPress, Programming language libraries, Network devices

Open source compliance automation for SOC 2, GDPR, ISO27001, NIST 800-53, and more

A FREE comprehensive online Rust hacking tutorial utilizing the x64, ARM64 and ARM32 architectures going step-by-step into the world of reverse engineering Rust from scratch.

BT ve siber güvenlik risk yönetimi platformu — risk envanteri, 5×5 değerlendirme, aksiyon takibi ve kurumsal raporlama. PHP 8.3 + MariaDB, framework ve CDN kullanmadan.

Run Windows and Linux programs on Windows, Linux and Android. A user-mode NT and Linux kernel emulator with WHP/KVM acceleration.

The open source taint analysis engine for the AI era. A formal dataflow analysis tool you can customize and self-host, built so AI agents drive your application security analysis without burning tokens on every scan. AI-ready open source alternative to Semgrep Pro and CodeQL.

Make your infrastructure invisible to attackers. OpenNHP implements the Network-infrastructure Hiding Protocol (NHP): authenticate before connection, cryptographically. IETF draft.

A FREE comprehensive online Go hacking tutorial utilizing the x64, ARM64 and ARM32 architectures going step-by-step into the world of reverse engineering Golang from scratch.

OpenCTI Connectors

🐸 Identify anything. pyWhat easily lets you identify emails, IP addresses, and more. Feed it a .pcap file or some text and it'll tell you what it is! 🧙‍♀️

Open-source and AI-powered cybersecurity tools for offensive security, vulnerability management, and autonomous pentesting. Built by hackers in Latin America, used worldwide.

Add a layer of active defense to your cloud applications.

🔍 Search anyone's digital footprint across 300+ websites

Shuffle: A general purpose security automation platform. Our focus is on collaboration and resource sharing.

Real-time phishing & scam domain blocklist - 205k+ curated threats, 1M+ community, free API, multiple formats

80k+ WordPress Nuclei templates, updated daily from Wordfence intel—filter by severity/tags/CVE and scan in one line. 🚀🔒

OpenAnt from Knostic is the leading open source LLM-based vulnerability discovery product, helping defenders proactively find verified security flaws while minimizing both false positives and false negatives. Stage 1 detects. Stage 2 attacks. What survives is real.

Real-time network monitor + outbound firewall — see & block every connection. Privacy-first, local-first, Rust fleet agent, SIEM exports, 8 languages. / Moniteur réseau temps réel + pare-feu sortant, agent de flotte Rust, exports SIEM. 100 % local.