Personal Data Leak Monitor

McGraw Hill data breach

13.5M accounts from McGraw Hill (mheducation.com) were exposed in this breach. Besides email addresses, it included names, phone numbers and physical addresses.

Breach date
April 10, 2026
Accounts
13,500,136
Added to the database
April 16, 2026

Was your email address in this breach?

Check if your email has leaked

We display where your address leaked and what went with it. We never store the address.

We don't store your address. It is checked right here against about 1029 breaches, including this one.

What leaked

Email addressesNamesPhone numbersPhysical addresses

What to do now

  1. Do not tap links in emails claiming to be that service
  2. Expect scam emails that use your real name
  3. Be alert to fake delivery or unpaid-bill texts and calls
  4. Be careful with unexpected mail or visitors

Tools that help with this breach

Norton 360PaidVisit the official site →(opens in a new tab)ESETPaidVisit the official site →(opens in a new tab)

About this breach

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.

Source: Have I Been Pwned (CC BY 4.0)

Similar breaches from the same period