Dealt with a similar mess when my homemade sauerkraut overflowed last month. In my experience, that's just part of the process, like @lucash53 said about putting everything on a big plate. You kinda learn to expect it after a while, but it still catches you off guard sometimes.
Honestly fermentation feels like the universe's way of teaching patience. My sourdough starter bubbled over last week, my kimchi seeped through its cloth cover. It's this constant low grade mess that reminds you nothing is fully under control. You just learn to put everything on a big plate and laugh when it happens again. The real skill isn't stopping the leak, it's not getting mad about it.