Synonyms for Leaky (same or very similar meaning)
WordNet sense 1 (not having control over urination and defecation):
incontinentWordNet sense 2 (prone to communicate confidential information):
blabbermouthed, talebearing, tattlingWordNet sense 3 (able or tending to communicate):
communicative, communicatoryFrom the ODE community, based on WordNetadd/edit