Cyber GitHub Repositories (2026) · Open Source Tools

Open-source AI penetration testing tool to find and fix your app’s vulnerabilities.

Hunt down social media accounts by username across social networks

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

JumpServer is an Open-source Privileged Access Management (PAM) platform with AI-powered capabilities, providing DevOps and IT teams a unified workspace to securely access SSH, RDP, Kubernetes, databases, websites, RemoteApp, VirtualApp, and more.

Comfortably monitor your network traffic 🕵️‍♂️

Open-source adversarial testing engine, SDK, and CLI for AI agents. Runs locally or against the Humanbound Platform.

Documenting my security research journey: This repository contains detailed vulnerability write-ups, proof-of-concept (PoC) exploits, and the custom automation tools I use for reconnaissance and system assessment.

Comprehensive 2026 OSINT guide — 450+ tools, AI intelligence, methodologies & ethics across 35 sections for investigation & threat intel.

Web-based Traffic and Cybersecurity Network Traffic Monitoring

Cloud-native SIEM for intelligent security analytics for your entire enterprise.

MISP (core software) - Open Source Threat Intelligence and Sharing Platform

A secure low code deception runtime framework, leveraging AI for System Virtualization.

AI-powered open-source platform for Attack Surface Management (OASM)

Open-source AI Security Operations Center: alert fusion, LLM-agent triage, MITRE ATT&CK investigation, and a replayable decision ledger for every agent step. Self-hostable, runs with no API keys, MIT licensed. Ships an MCP server for Claude, Cursor and Continue.

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

Linux defense. Your host. Your rules. Host-local Linux defense with auditable, fail-closed enforcement.

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

tirreno is an open-source framework for building sovereign security, compliance and fraud prevention applications. Detect account takeovers, cyberfraud and business logic abuse inside your product.

🕵️‍♂️ Collect a dossier on a person by username from 6K websites

⚡ Automatically decrypt encryptions without knowing the key or cipher, decode encodings, and crack hashes ⚡