McGraw Hill

Medium

Data breach — April 2026

In April 2026, education company McGraw Hill confirmed a data breach following an extortion attempt. Attributed to a Salesforce misconfiguration, the company stated the incident exposed "a limited set of data from a webpage hosted by Salesforce on its platform". More than 100GB of data was later publicly distributed, containing 13.5M unique email addresses across multiple files, with additional fields such as name, physical address and phone number appearing inconsistently across some records.

13.5M

Records exposed

2026

Year

Data types

Free

To check

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Quick answer — was McGraw Hill breached?

Yes. McGraw Hill was breached in April 2026, exposing 13,500,136 records including email addresses, names, phone numbers. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.

What happened in the McGraw Hill data breach?

The exposed data included 4 types of personal information. Learn more about what a data breach means for you.

Why was the McGraw Hill breach so dangerous?

The McGraw Hill breach exposed 13,500,136 records — 13.5M people whose personal data is now circulating in criminal markets.

Don't wait to find out — check if your email was exposed in this breach.

What data was stolen in the McGraw Hill breach?

Email addresses Names Phone numbers Physical addresses

Email addresses — used for phishing attacks and credential stuffing against your other accounts

Names — used to build profiles and target you with personalised scams

Phone numbers — enables SIM-swapping attacks and targeted SMS phishing

Physical addresses — combined with other data, used for identity theft and physical fraud

Is the McGraw Hill breach still dangerous in 2026?

Yes. Stolen data from the McGraw Hill breach remains dangerous years after the incident. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2026 are still actively used in automated attacks today.

Personal information like email addresses, phone numbers, and dates of birth does not expire. Even if you changed your McGraw Hill password, the other exposed data can be combined with information from other breaches to target you. Learn how long stolen data stays dangerous.

What to do if your email was in the McGraw Hill breach

Change your McGraw Hill password immediately

Log into McGraw Hill and change your password to something strong and unique — one you have never used anywhere else.

Change any account sharing that password

If you reused this password elsewhere, change it on every affected account. Attackers test stolen credentials against hundreds of popular sites within hours.

Enable two-factor authentication

Turn on 2FA on McGraw Hill and every important account. Even if your password is known, attackers cannot access the account without the second factor.

Check your other accounts for this breach

Run a full email scan to see every breach your address appears in — not just this one.

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Frequently asked about the McGraw Hill breach

How many people were affected by the McGraw Hill data breach?

Approximately 13,500,136 user records were exposed in the McGraw Hill breach in April 2026.

Is the McGraw Hill breach still a risk in 2026?

Yes. Leaked credentials are actively used in credential-stuffing attacks years after a breach. If you reused your McGraw Hill password elsewhere and have not changed it, those accounts remain at risk today.

How do I check if my email was in the McGraw Hill breach?

Enter your email in the free checker on EmailLeaked. We scan millions of breach records including the McGraw Hill dataset and tell you instantly whether your email was exposed and what data was taken.

What should I do if I was in the McGraw Hill breach?

Change your McGraw Hill password immediately, update any account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.

How this breach page is reviewed

Breach pages are built from structured breach records and reviewed for practical risk guidance by EmailLeaked. Risk labels reflect exposed data types and are intended to help readers prioritise action.

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