When in survival mode, a spider mob can harm you through glass panes by walking towards it. Not sure if other hostile mobs can do this but the spiders are the only ones I have encountered. THanks
MC-58180
Spiders harm player through glass pane
Resolved
Duplicate
1
Hayden White
(Unassigned)
Unconfirmed
Minecraft 14w25b
Retrieved
Probably intended as the actual hitbox of a spider is not exactly the same as the "hit/attack"box, making him able to move his "attack"box through the glass pane because its so thin that the hitbox doesn't hit the glass and the spider can hit you.