OWASP Cheat Sheet Series

The OWASP Cheat Sheet Series is a collection of short, practical security guides for developers. Each sheet covers one topic, such as input validation, authentication or a specific framework.

The guides explain common security problems and the accepted ways to prevent them. Pages are organised by topic, by standard and by language or framework, so you can find the one you need quickly. The source is kept on GitHub, where the community suggests changes.

• Short guides on single security topics
• Index by topic, by standard and by framework
• Covers web, cloud, container and AI-related topics
• Language guides for Java, Node.js, Django and more
• Source hosted on GitHub under a CC BY-SA licence

• Developers who want a quick reference while building features
• Code reviewers checking a change against known patterns
• Engineering teams setting shared security habits

The content is open for use under a Creative Commons licence, and the repository is open source. Each sheet gives general guidance, so it does not replace a full security review or a specialist's advice for your system. Check the date and framework version before applying a specific recommendation.