Cal AI, New Owner of MyFitnessPal, Hit by Alleged Breach of 3 Million Users

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Cal AI App Breach Exposes Data of Over 3 Million Users The Cal AI calorie tracking app reportedly suffered a data breach affecting over 3 million users. The breach was allegedly executed by a threat actor named 'vibecodelegend,' who leaked a dataset containing sensitive user information, including full names, dates of birth, gender, health details, subscription information, and transaction IDs. The data was reportedly obtained from a misconfigured Google Firebase instance. Cybernews researchers have indicated that the leaked dataset appears legitimate, raising concerns about potential social engineering attacks. Although Cal AI has not yet confirmed the breach, the incident has drawn attention following the company's recent acquisition by MyFitnessPal. The breach was first reported on March 10, 2026, when the dataset was posted on a cybercrime forum. The implications of this breach could be significant, given the nature of the data involved. 3 sources 63