leak out

verb3

1. •
   To spill or pour out, because of a leak.

   • Water leaked out onto the floor.
2. •
   (figurative) To be revealed (especially, of information intended to be kept secret).

   • The news of her pregnancy eventually leaked out to the press.
3. •
   (figurative) To disclose secret information surreptitiously or anonymously.

   • For example, when U2 songs appeared on the Internet before they were pressed onto CDs, it was someone inside the recording studio who leaked them out. — 2003