The error allowed Approximately 1500 applications will have access to private photos for 12 days, until September 25, Facebook said. The affected user who authorizes third party applications to access their photos.
"We regret that this has happened", the company said in a blog aimed at developers who create applications for their platform.
The problem is the latest in a series of security and privacy issues which has caused complaints from users and has led to investigations by regulatory authorities and legislators.
The most resonant was the massive scandal associated with the consultancy service Cambridge Analytica and a security breach that affected nearly 30 million Facebook users.
The company said it would send a warning via its page to notify users whose images may have been exposed to the latest error. The alarm will lead you to a link where you can see if they have used any application that has wrongly allowed access to private photos.
A priori incident seems to be relatively small, but could lead to European supervisory authorities initiating surveys on Facebookhe said Brian Wieser, analyst at Pivotal Research. "We already have a lot of evidence to reinforce the idea that Facebook is sloppy "he stated.
George Salmon, an analyst at Hargreaves Lansdown, said that new bug and violation reports increase the likelihood that governments will introduce new rules for Facebook's business practices.