It is in the game. Just don't equip it if you don't want to get stuck with it. It doesn't pretend to be a fake object unlike other cursed items.
Viewing post in Progress Rework: Gear Update Part I comments
Thanks for the head's up, I was scared items like that could be forced by mimics. That would be akin to the Yellow Plague Zombies in Diablo 1 that permanently drop your max HP on hit.
That makes me wonder; can the curse be dispelled at the church? And is it possible to remove the item by forcing a cursed class by having the adventurer wear 3 maid, cow, etc accessories?