https://www.quora.com/Why-should-I-worry-about-the-Snapchat-data-leak-What-could-would-hackers-do-with-this-kind-of-data-Why-is-it-a-risk-to-me
Yes, on December 31, 2013, the Snapchat was hacked and 4.6 million usernames and phone numbers were leaked to the Internet. Source: Snap Inc.