OWASP 2026 LLM Top 10 Threats: Prompt Injection Reigns Supreme for Third Year, AI Agent Excessive Agency Rises to #3
OWASP released the latest GenAI LLM Top 10 security threat list on August 3, 2026. Prompt Injection retains the top spot for the third consecutive year, while Excessive Agency surged from sixth to third place. This year’s report is the first to be cross-validated against a database of approximately 10,000 real-world AI security incidents, revealing a significant gap between expert concerns and actual threats. The findings provide critical guidance for enterprise AI security deployment, emphasizing that AI security is a continuous operational practice rather than a one-time project, with permission control and behavioral monitoring being essential as AI agent capabilities rapidly expand.
