An archive leak is the alleged exposure of stored files or records, often packaged as a compressed archive, backup, export, or internal document set. The term does not by itself prove a breach, but it signals that material meant to stay private may have been copied, published, or offered for download.
In cyber security, archive leaks matter because a single file bundle can contain sensitive data such as contracts, credentials, source code, customer records, or operational notes. Attackers may use archive leaks for extortion, public pressure, or proof-of-access claims. Defenders should treat the label as a warning and verify logs, access history, retention controls, and sharing permissions. The key question is not only whether an archive exists, but whether it was reachable, exposed, or reused in a way that created real risk.