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When passwords get exposed in a leak or breach.

Definition

A password leak happens when passwords (or password hashes) are exposed through a breach, misconfiguration, or malware.

In plain English When passwords get exposed in a leak or breach.

Why this matters

Why it matters: Leaked passwords can lead to account takeover, especially if you reused them.

Example

Example: A hacked website’s database is posted online, including password hashes.