A structured penetration testing knowledge base with methodologies, tool lists and reference PDFs across 23 security domains, from web and mobile to cloud and Wi-Fi.
#security-testing
Best open-source security testing tools (2026)
These projects actively look for security flaws before release, covering web endpoint discovery, mobile app reverse engineering, automated penetration testing, and adversarial testing of AI agents. Pick by target first: web apps, mobile apps, or LLM-based systems, then check whether you need features like headless browser support. Katana is a fast, configurable crawler with standard and headless modes, suited to endpoint discovery. OWASP MASTG is a comprehensive manual for Android and iOS testing methods rather than a tool. ARTEX runs penetration tests autonomously with LLM agents and is licensed under AGPL-3.0, which requires derivative distributions to share their source.
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Open-source AI system that autonomously runs penetration tests using LLM agents, with a Go backend and Next.js web UI.
Open-source adversarial testing engine, SDK and CLI that attacks AI agents via live endpoints and turns failures into firewall rules.
A comprehensive OWASP manual describing technical processes for mobile app security testing and reverse engineering on Android and iOS.
Command-line and library scanner that red-teams system prompts and agent instructions for prompt extraction and injection vulnerabilities.
A fast, configurable web crawler and spider framework from ProjectDiscovery, with standard and headless browser modes for discovering endpoints.