https://www.theregister.co.uk/2017/11/22/uber_2016_data_breach/

Uber's CEO Dara Khosrowshahi today revealed hackers broke into the ride-hailing app's databases and stole personal information on 57 million passengers and drivers – information including names, email addresses, and phone numbers.

And the cyber-thieves made off with 600,000 US driver records that included their license numbers.