MITRE’s Center for Threat-Informed Defense has launched the AI Incident Sharing initiative, collaborating with over 15 companies to enhance AI system defenses. The initiative, part of the Secure AI project, facilitates quick and secure sharing of AI-related threats, attacks, and accidents, expanding the MITRE ATLAS community knowledge base. Contributors receive anonymized data on real-world incidents, supporting data-driven risk analysis. Incidents can be submitted via a web portal, and submitting organizations may join the initiative. The Secure AI project also updated the ATLAS threat framework, adding generative AI-focused case studies and attack techniques. Collaborators include prominent organizations from diverse industries such as technology, healthcare, and financial services, aiming to improve collective AI defense.