泄露

He was shocked any leakage of the report should have taken place.

The secret is in the open. / The secret has slipped/oozed out.

leakage of personal information

leak users'private information

disclose/divulge/leak the inside information (to sb)

divulge details of a project

reveal/betray/disclose/leak/let out/divulge/give away a secret

disclose/divulge/betray a state secret

give away the answer