leak (something) to (someone or something)
To release or reveal information that was supposed to remain secret or classified to someone, something, or some group. A White House staffer has been accused of leaking the president's agenda out to the press. A whistleblower within the company leaked out information about their tax evasion practices.
leak something to someone
Fig. to tell [otherwise secret] information to someone. The government leaked a phony story to the press just to see how far it would travel. The government leaks things to the press occasionally, just to see the reaction.