Udemy data breach: 1.4M accounts exposed
Severity: medium · Patch status: no-fix-needed · Since 2026-04-26
In April 2026, online training company Udemy was the victim of a “pay or leak” extortion attempt perpetrated by the ShinyHunters group. The data was subsequently leaked publicly and contained 1.4M unique email addresses belonging to customers and instructors. The data also included names, physical addresses, phone numbers, employer information and instructor payout methods including PayPal, cheque and bank transfer. Exposed data: email addresses, employers, job titles, names, payment methods, phone numbers, physical addresses. The breach dates from Apr 24, 2026; Have I Been Pwned loaded it on Apr 26, 2026.
What to do
- If you had a Udemy account, change its password and the password of any other account that reused it.
- Turn on multi-factor authentication wherever it is offered.
- Check whether your addresses are in this breach at https://haveibeenpwned.com.
- Expect targeted phishing that quotes the leaked details; verify any unexpected contact out of band.
Sources
All live incidents on Threat Watch
