Mytheresa
Retail & E-Commerce · Almanya
Sensitive customer PII data and transactional history data was compromised. Pay or leak. This is a final warning to reach out by 14 Apr 2026 before we leak along with several annoying (digital) problems that'll come your way. Make the right decision, don't be the next headline. | Updated: 11 Apr 2026 | Warning: FINAL WARNING PAY OR LEAK
Data size
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Ransomware
Unknown
Corroboration in official records
Beyond the gang's leak site, the claim about this organisation also appears in these records:
- Have I Been PwnedOpen source
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.
DayBreach AI intelligence
Timeline
Record updated
Victim announced
Attacker
Shinyhunters
ShinyHunters is a financially motivated data-theft and extortion group active since 2020, responsible for high-profile breaches including Ticketmaster (via Snowflake) and PowerSchool; by 2025 they launched a RaaS offering called "shinysp1d3r," and in August 2025 French authorities arrested four members.