Cal AI faces data breach claims after hackers post alleged data of 3 million users, including emails, health details, and subscriptions.

A hacker using the alias “vibecodelegend” is claiming responsibility for breaching Cal AI, a smartphone application that uses artificial intelligence to track calories and nutritional information. The alleged breach was announced on Monday, March 9, 2026, through a post on the cybercrime marketplace BreachForums.

Cal AI has grown rapidly in popularity due to its use of artificial intelligence to help users track calories by analyzing food images and nutritional information. The platform recently attracted further attention after acquiring the widely used fitness app MyFitnessPal, expanding its presence in the health and nutrition tracking market.

It is worth noting that MyFitnessPal itself suffered a massive data breach back in March 2018 when the platform’s previous owner, Under Armour, revealed that hackers stole personal details of over 150 million users.

As for the Cal AI data breach claims, in the forum post, the individual claimed to have obtained and leaked 12 ...