It can happen. Never make the mistake of assuming any given dog is nice because it’s a Lab, or Golden, or whatever “they never hurt anyone!!!” type.
Our neighbors had litter-brother Labs. The chocolate was the stereotypical kind, dopey and lovable. The yellow was absolutely dog-aggressive and more serious. He would bark when people rang OUR doorbell across the street! (Our Shepherd usually was clueless and didn’t care anyway.)
We forget there’s wolf in our living room at our own peril.