Gizmodo reported:

If you have a Facebook account, you should probably be keeping your guard up in the near future. A new report states that a hacker has posted the private information, including phone numbers, birthdays, and locations, of more than 533 million Facebook users from 106 countries online for free.

According to Insider, the hacker was part of a low level hacking forum and posted the information on Saturday. The information exposed reportedly also includes Facebook IDs, full names, bios, and, in some cases, email addresses. The data accessed is purportedly from 2019. Insider stated that the leaked data included information on 32 million users in the U.S., 11 million users in the UK, and 6 million users in India.

The outlet reviewed a sample of the leaked data and verified a series of records "by matching known Facebook users' phone numbers with the IDs listed in the data set." Insider also confirmed the data's accuracy by typing in exposed email addresses into Facebook's password reset feature, which shows part of a user's phone number.