Mytheresa Data Breach

What happened?

In April 2026, the luxury fashion e-commerce platform Mytheresa was listed as a victim of the ShinyHunters "pay or leak" extortion group . After the ransom deadline passed, the group publicly released the data which contained 84k unique email addresses. The exposed data also included names, phone numbers, physical addresses, purchases and partial credit card data including card type, last 4 digits and expiry date.

When did it happen?

The breach date in the public record is April 12, 2026. The record was added to the catalogue on May 27, 2026 and last updated there on May 27, 2026.

What information was reported as exposed?

• Email addresses
• Names
• Partial credit card data
• Phone numbers
• Physical addresses
• Purchases
• Salutations

These are incident-level categories. The record does not prove that every category was exposed for every affected person.

Who may be affected?

This record may be relevant to people who had an account or other relationship with Mytheresa or used mytheresa.com around April 12, 2026. A catalogue entry does not establish that every customer was affected or that every listed data category applied to each person. Compare the record with an official notice addressed to you.

What should you do?

Choose actions that match the information involved. If you find signs that someone is using your identity, the Federal Trade Commission provides a personal recovery plan at IdentityTheft.gov.