In many cases, the rule of evidence of confessional privilege forbids judicial inquiry into communications made under the seal of confession. ... However, the Court later ruled that a priest has no duty to report confidential information heard during a sacramental confession.
Can a priest report you?
Under Roman Catholic law, it is forbidden for a priest to disclose information — under any circumstances — obtained in the form of religious confession. ... If a priest breaks what's called "the sacred seal of confession," he will be subject to excommunication from the church.
Do priests have a duty to warn?
Clergy members do have duties to warn of criminal activity occurring within their ranks. For example, if a parishioner goes to a priest and discloses that another priest molested him, then the priest who learns about the abuse has a duty to report it.