>I reached out to the CEO and basically the first question whas who was it to leak this and then basicly a statement that the company did not accuse me of anything and there is nothing that can be done about the gossip.

If it was a formal statement then you have nothing to worry about. If the slander is getting to you mentally, you could seek legal counsel but sounds like they can't actually do anything to you

If it was not formal, and there is a chance they can take you to court, then you need to get legal counsel, as you need to prep for defending yourself in court. If, as you say, they should not have anything which points to you being the malicious one here, then the hardest part is going to be the lawyer fees.