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It may be the biggest privacy scandal in the history of a social media giant — one that has seen its fair share of privacy scandals before.

That’s what several French newspapers were reporting on Monday. According to the Metro newspaper, private messages sent between Facebook users are now showing up on public walls.

At first, the newspaper reported, only messages between 2007 and 2009 were showing up publicly. Later, the newspaper reported no messages were safe. As of 11:59 p.m., TechCrunch was reporting that the issue is now starting to affect Facebook accounts in the United States. 

The messages are apparently appearing directly on users’ Facebook walls and in the box on the right sidebar of most pages that reads: “[#] friends posted on [user]’s timeline.” Metro initially reported that the issue did not appear to be systematic and that it affected only certain accounts. It was unclear if this reported security breach has the potential to become systematic

Shortly after 1 p.m., Facebook told CNN there has not been a breach in its privacy security. 

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