Company archive

McGraw Hill data breach history

Breached tracks public reports, source links, affected counts, exposed data types, and updates for McGraw Hill.

Breaches

Known affected

13,500,136

Latest report

5/1/2026

Data types

Common exposed data

Email addresses Names Phone numbers Physical addresses

Tracked reports

canonical

Critical12d ago

McGraw Hill

McGraw Hill confirmed a data breach in April 2026 affecting 13.5 million accounts, exposing email addresses, names, phone numbers, and physical addresses due to a Salesforce misconfiguration.

Email addressesNamesPhone numbers+1 more

13.5M