It is a "leak" when additional data that was previously private, such as modeling and analytic information, gets published against the will of its owners. Howe

It is a "leak" when additional data that was previously private, such as modeling and analytic information, gets published against the will of its owners. However, it isn't a "leak" in the traditional colloquial sense that someone stole the data and released it to the public. It's just a security leak.