https://www.siliconvalley.com/2019/04/17/facebook-says-it-uploaded-email-contacts-of-up-to-1-5-million-users/

(Reuters) – Facebook Inc said on Wednesday it may have “unintentionally uploaded” email contacts of 1.5 million new users since May 2016, in what seems to be the latest privacy-related issue faced by the social media company.

In March, Facebook had stopped offering email password verification as an option for people who signed up for the first time, the company said. There were cases in which email contacts of people were uploaded to Facebook when they created their account, the company said.