Epic Games delayed the v5.3 update, with updates usually releasing on Tuesday or Wednesday. However, v5.3 was released today, along with a host of leaks, including the possiblity of a flamethrower and a quad launcher coming to game.
Here are all the Fortnite Cosmetics that were found/leaked in the v5.3 update:
Gliders & Pickaxes
Fortnite Back Blings