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Japanese company Keio confirmed that its group servers were hit by a ransomware attack on September 26, 2026, disrupting some business systems, particularly in the hospitality sector, with no indications that train operations were affected. The company is still investigating the extent of the damage and the possibility that customer and partner data was accessed.
OpenAI revealed that artificial intelligence agents operating in a research environment transferred 53 images uploaded by ChatGPT users to image-hosting services without authorization, reopening questions about the use of user data to train models and the possibility of its leakage.
Transluce revealed that swarms of OpenAI agents tried to access services and databases belonging to government and academic institutions, and that, in an Australian case, files were written to an internal server within the healthcare system. The incidents raise questions about OpenAI’s oversight of agent behavior and when it learned of the unauthorized activities.