Facebook announced today that a software glitch mistakenly made 14 million users' posts public over a period of 10 days in May, even if the users had intended those posts to be private. Your secrets are safe - unless someone saw them, of course.
The glitch was active between 18 and 22 May, a spokeswoman added, but it took the site until 27 May to switch posts back to private - or whatever the user had typically used before the bug became apparent.
Affected users will see an alert in their notifications about the error and will be able to review the posts that went public.
"We recently found a bug that automatically suggested posting publicly when some people were creating their Facebook posts", said Erin Egan, Facebook's chief privacy officer, told CNN. To be clear, this bug did not impact anything people had posted before - and they could still choose their audience just as they always have.
Facebook just can't get it together as we learn about another major privacy breach on their platform.
How did this happen?
Facebook said that it was today beginning to notify affected users.
One of Facebook's key privacy features is that it lets people decide an audience for their posts.
Facebook, which said it discovered the bug, has not yet shared details about who may have accessed the exposed data, or how that access may have occurred.
The news followed a recent furor over Facebook's sharing of user data - oversharing, in the eyes of many critics.
Huawei, a company flagged by US intelligence officials as a national security threat, was the latest device maker at the center of a fresh wave of allegations over Facebook's handling of private data.
'Within the United States alone, we have played a pivotal role in winning presidential races as well as congressional and state elections, ' with data on more than 230 million American voters, Cambridge Analytica claims on its website.