Your private photos may now be public thanks to a Facebook bug that is affecting millions of users.

Facebook announced a bug may have allowed apps to access private photo pictures, even ones uploaded, but not posted. It happened over a 12 period in September.

When someone gives permission for an app to access their photos on Facebook, we usually only grant the app access to photos people share on their timeline. In this case, the bug potentially gave developers access to other photos, such as those shared on Marketplace or Facebook Stories. The bug also impacted photos that people uploaded to Facebook but chose not to post.

6.8 million Facebook users were affected by up the bug that allowed up to 1,500 apps built by 876 developers to gain access to your photos between September 13 to September 25, 2018.

We're sorry this happened. Early next week we will be rolling out tools for app developers that will allow them to determine which people using their app might be impacted by this bug.

If you were affected you'll get a Facebook alert. Or check for yourself in the Facebook Help Center to see if any of your Facebook apps accessed your photos. Hopefully, you'll get an alert like this one....

Photo Credit - Facebook