So I was turned into a Lustrated Daedrat.
I had just teleported to the Leyawiin Outskirts wayshrine from Auridon, opened the Crown Store and looked at a few of the crate items then exited the menu. Spoke to Brigadine Antonius and started heading towards the Battlegrounds camp. About halfway there I swapped weapon sets and my character model changed from my character to a Lustrated Daedrat with my bow laying underneath it.

I am able to access the menus and interact with NPCs and "sit" on nearby benches in the environment as a daedrat. But I am not able to interact with the wayshrine or attack anything. I am able to summon my mount and "ride" it from underneath as a rat.

I managed to turn myself back into a wood elf by previewing another pet in the Crown Store, but turned into a large version of the vulture gryphon pet model after attempting to swap weapon sets.

After swapping through a few more pets it finally seems that I managed to break out of whatever curse I was under and was able to successfully swap weapons without being Wabbajacked. No ill effects noticed since.
I checked the forums but didn't see anything like this. Has anyone else run into this bug?