Facebook announced that a bug in its application programming interface for photos may have allowed third-party unauthorized access to images on 6.8 million accounts. The company estimates that the issue affects up to 6.8 million users and that 1,500 apps from 876 developers could have accessed the image content without consent. Facebook is contacting the app developers and asking them to check for pictures that should not have been accessed and to delete the content. It is suspected that the amount of people affected will ultimately be smaller.
Source: https://www.bleepingcomputer.com/news/security/facebook-photo-api-bug-exposed-pics-of-up-to-68-million-users/