Internet leak

An Internet leak occurs when a party's confidential information is released to the public on the Internet. Various types of information and data can be, and have been, "leaked" to the Internet, the most common being personal information, computer software and source code, and artistic works such as books or albums. For example, a musical album is leaked if it has been made available to the public on the Internet before its official release date.
Album leaks.
The rise in leaks during the 2000s led to some popular recording artists surprise-releasing their albums.
Source code leaks.
Source code leaks are usually caused by misconfiguration of software like CVS or FTP which allow people to get source files through exploits, software bugs, or employees that have access to the sources or part of them revealing the code in order to harm the company.
There were many cases of source code leaks in the history of software development.
End-of-life leaks by developers.
Sometimes software developers themselves will intentionally leak their source code in an effort to prevent a software product from becoming abandonware after it has reached its end-of-life, allowing the community to continue development and support. Reasons for leaking instead of a proper release to public domain or as open-source can include scattered or lost intellectual property rights. An example is the video game "Falcon 4.0" which became available in 2000; another one is "Dark Reign 2".