MH

Confirmed breach

McGraw Hill data breach

Country being checked · mheducation.com · parent: Platinum Equity (Wikidata)

A breach of McGraw Hill was added to Have I Been Pwned’s breach database on 16 April 2026. It affected 13,500,136 accounts. Exposed: Email addresses, Phone numbers, Names and Addresses. The breach began on 10 April 2026, 6 days before it was reported.

Status

Confirmed breach

People affected

13,500,136 accounts

Reported

16 April 2026

Breach began

10 April 2026

Time to tell

6 days (the median in California’s notices over the last year: 154 days)

What was exposed

• Email addresses
• Phone numbers
• Names
• Addresses

Sources

• Breach database · 16 April 2026 · 13,500,136 accountsHave I Been Pwned

Breach databases are read by code. · Corrections and changes

If McGraw Hill had your data

1. Look for McGraw Hill’s own notice or letter: it should say what of yours was involved. Keep it.
2. Expect scams that use your details: calls, texts or emails pretending to be McGraw Hill, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

• Spot the scams that use leaked data →
• What to do after a data breach →

Email me if McGraw Hill has another breach

Alert me

One email to confirm first. We use your address only for this alert, and one click deletes it.

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.