You might want to check the photos that are on your phone.
Other users have since reported similar issues, but no cause has been found.
"Last night around 2:30 am, my phone sent her my entire photo gallery over text but there was no record of it on my messages app", they explained.
The apparent bug has allegedly affected one of Samsung's newest smartphones, the Galaxy S9+ and S9, as well as the Note 8, which was released previous year. The issue seems to be limited to T-Mobile customers in the United States.
The problem is stemming from the Samsung Messages app, which is the default SMS app on the devices which are affected.
Some phones by Samsung are sending camera roll photos of the users to random contacts in their phone.
Until a resolution is reached, Samsung owners can go to settings and revoke Samsung Message's permissions to access storage. Android Central notes that the issue appears to be with the Samsung Messenger app and not any specific wireless carrier.
Many complaints posted online are from people who said they are T-Mobile customers and recently updated Samsung Messages, leading to a theory that the issue may have been triggered by the carrier's recent RCS (Rich Communication Services) updates.
However, a T-Mobile spokesperson told The Verge to 'check in with Samsung on this, it's not a T-Mobile issue'. What makes the matters worse is that the app does not even show users if the files have been sent.
In the meantime, it has been suggested that users should switch to a different messaging app.
You should acknowledge that doing this will prevent you from sending multimedia messages via the Messages app until you turn permissions back on.
In another potentially embarrassing case, a Samsung Note 8 user reported that his scheduled text messages had been sent to the wrong recipients.