The CAPG's Blog
Are there any circumstances in which the priest may reveal what he has hear in confession?
The priest may never, under any circumstances reveal what he has heard in a sacramental confession; it is never lawful to manifest the least thing told by a penitent in confession. It is a grave sin, a sacrilege to make known the least sin, the knowledge of which was acquired by a sacramental confession. Not even to save his own life or the life of the penitent, not even to save the soul of the penitent, may the priest break the seal of confession. in most countries, the civil law recognizes the sacred character of this seal and does not oblige the priest from this solemn obligation of secrecy; outside of confession, he may not speak of confessional matter even to the penitent without the latter's express permission. What is told in confession ends there, as far as the confessor is concerned. History records that the priesthood has been true to this secret trust; priests have been severely punished, many exiled, some martyred, because they refused to reveal the secrets of the confessional. Catholic people recognize this fact and know that their trust and confidence will never be betrayed by their confessor.
Source: Our Young People, 1916