The OWASP Top 10 for LLM Applications 2026 is a community-driven guide to the most critical security risks facing large language model applications. Developed by hundreds of AI security experts, the edition introduces updated rankings, expanded threat coverage, and new research grounded in thousands of real-world AI security incidents. It provides practical explanations, attack scenarios, and actionable mitigations for developers, architects, security teams, and CISOs, while mapping risks to frameworks including NIST, MITRE ATLAS, CWE, and the OWASP Top 10 for Agentic Applications. The release includes revised risk rankings, refined security guidance and mitigations, new insights into emerging attack techniques, and coverage of the latest real-world LLM and GenAI threats. The OWASP Gen AI Security Project helps organizations navigate the generative AI landscape with practical resources, risk strategies, and global collaboration, supporting CISOs, IT leaders, security teams, engineers, developers, and policymakers.