There have definitely been recalls/warnings for firearms which have misfired without anyone's finger on the trigger.
https://www.cnn.com/interactive/2018/06/investigates/sig-sau...
https://www.cnn.com/interactive/2018/06/investigates/sig-sau...
But as long as you always treat your firearms as loaded and never point it at something you're not willing to kill or destroy, you shouldn't have any "accidents".