For 14 million Facebook users, a "software bug" changed their privacy settings without notifying them.
Facebook announced on Tuesday that millions of users had their privacy settings accidentally changed by a "software bug," letting anyone on the internet read status updates and posts that were intended only for private audiences.
The company says that the problem occured between May 18 and May 27, but has since been fixed.
Facebook told Recode that 14 million users may have been affected, and that whose posts were made public incorrectly will be notified. Users have already taken to Twitter to show what the notification looks like:
Facebook did not immediately respond to a request for comment.