Learn cybersecurity, from the foundations up.
A community-maintained, structured knowledge base. Foundations, offensive and defensive practice, governance, intelligence and career guidance, in one coherent tree, free and open.
Offensive / Web / Injection
1667+
Pages
6
Tracks
70
Languages
100%
Open source
Why it exists
Security knowledge is scattered across blogs, slides and paywalls. Cyber Library gathers it into one coherent, versioned tree, so you can see how every topic connects and learn a subject properly instead of in fragments.
Structured, not scattered
One tree from first principles to specialised practice, so you always know where a topic sits and what comes next.
Open and community-maintained
Every page lives on GitHub. Anyone can read it, correct it or extend it, and the history is public.
Breadth with depth
Six tracks cover the whole field, each deep enough to be useful on the job, not just an overview.
The six tracks
Six tracks, one connected library
Start wherever you are today. Each track runs deep and links back into the same tree.
Foundation
Where every security career begins.
Explore the roots of cybersecurity in hacker culture, its evolution into a vital discipline, the ethical debates surrounding hacking, and the critical role of risk management and human behavior.
Inside this track
- How computers, networks and the web actually work
- The vocabulary the whole field is built on
- Mental models you reuse in every other track
Offensive
Think like an attacker, break things on purpose.
Discover how ethical hacking, red teaming, bug bounty programs, and other offensive security techniques help identify and address vulnerabilities across physical, network, software, and human layers.
Inside this track
- Web, software and network exploitation
- From reconnaissance to a working proof of concept
- Injection, filter bypasses and privilege escalation
Defensive
Detect, respond and make attacks expensive.
A practical overview of defensive cybersecurity, covering threat intelligence, vulnerability assessments, incident response, and continuous improvement strategies to ensure business resilience.
Inside this track
- Hardening, monitoring and detection engineering
- Incident response from first alert to recovery
- Reading an attack in order to shut it down
Governance
Turn security into decisions and policy.
A comprehensive guide to cybersecurity governance, covering its definition, importance, and practical steps for effective implementation.
Inside this track
- Risk, compliance and security frameworks
- Policies that teams actually follow
- Audits, controls and measuring what matters
Intelligence
Connect the signals before they become incidents.
A comprehensive overview of cybersecurity intelligence, focusing on its strategic, operational, and tactical levels, and how it guides proactive defenses and risk management.
Inside this track
- Threat intelligence and adversary tracking
- Open source intelligence and structured analysis
- Turning raw data into early warning
Career
Grow from curious beginner to trusted expert.
A thorough overview of diverse cybersecurity career paths, roles and responsibilities, essential skills, and the value of certifications and academic degrees.
Inside this track
- The roles, paths and how they connect
- Building a profile and proving your skills
- Interviews, certifications and the next step
Structured, not scattered
See the whole library as a map.
Every topic lives in one connected tree, not a pile of posts. Explore it visually: expand any branch, search across thousands of nodes, and see how each technique relates to the rest.
8,000+ topics · 6 tracks · 17 levels deep
Open the structure mapFor AI assistants
Plug the whole library into your assistant.
Cyber Library ships a public MCP server. Claude, ChatGPT, Cursor or any Model Context Protocol client can search the library, read any page as markdown and browse the tree, with sources it can cite.
- Grounded answers Your assistant reads the actual page instead of guessing, and links you to it.
- The full structure Search, outline and page tools cover every published topic, plus the editorial plan.
- One line to connect No key, no account. Add the endpoint and start asking.
Endpoint
https://www.cyberlibrary.com/api/mcpClaude Code
claude mcp add --transport http cyber-library https://www.cyberlibrary.com/api/mcpBuilt by the community, open to everyone.
Every page is on GitHub. Fix a detail, add an example, or write a whole section.
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