The act of leaking out—of liquids, gases, information, etc.; can be used as a noun or as a verb with 'suru' (to leak).
配管の破損でガスが漏出したため、近所が避難した。
Because of a pipe break, gas leaked out and neighbors evacuated.
社内資料の漏出が報道され、会社は大きなダメージを受けた。
The leak of internal documents was reported in the press, and the company suffered major damage.
油の漏出を防ぐために緊急修理が行われた。
Emergency repairs were carried out to prevent oil leakage.