All Breaches
July 11, 2012 Verified Retail

Yahoo Data Breach

The Yahoo data breach affected approximately 453,427 user records according to the record dated July 11, 2012. The recorded fields are email addresses and passwords.

453.4 Thousand
Reported Records
2
Data Types
High
Severity
Oct 10, 2026
Last updated

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Exposed Data Types

2
  • Email addresses
  • Passwords

About This Breach

Email addresses and passwords together can support unauthorized login attempts against other services where the same password was reused. Email addresses can also make fake account-security, recovery, or support messages more convincing.

A match means that the queried email address appears in the dataset; it does not prove that the account was compromised today. Change the password, replace it anywhere it was reused, enable multi-factor authentication, and do not log in through incoming links.

Verification and editorial method

LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.

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