All Breaches
April 10, 2026 Verified Education

McGraw Hill Data Breach

The McGraw Hill data breach is a verified incident dated 10 April 2026 involving 13,500,136 unique email addresses.

13.5 Million
Reported Records
4
Data Types
Critical
Severity
Yes
Verification

Exposed Data Types

4
Email addresses
Names
Phone numbers
Physical addresses

Additional Information

Added DateApril 16, 2026
Breach DateApril 10, 2026
Domainmheducation.com
SourceConfiguration exposure
Last Content UpdateJuly 20, 2026

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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Company Information

Company NameMcGraw Hill
SectorEducation
CountryUnited States
Websitemheducation.com

Risk Level

Critical

The reported impact exceeds 1 million and falls within the critical severity band.

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