What was exposed, when it happened, and which databases confirm it.
- accounts
- 165,984
- Breached
- April 12, 2026
- Last Update
- May 27, 2026
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
Your address never leaves this page: it is hashed in your browser and only a short fragment of that hash is sent.
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.
Compromised Info
- Email addresses
- Names
- Partial credit card data
- Phone numbers
- Physical addresses
- Purchases
- Salutations
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- LeakCheck— linked via automatic string matching
- HIBP
FAQ
What was leaked in the Mytheresa breach?
The Mytheresa breach exposed: Email addresses, Names, Partial credit card data, Phone numbers, Physical addresses, Purchases, and Salutations.
When did the Mytheresa breach happen?
The Mytheresa breach was disclosed on April 12, 2026 and affected 165,984 records.
Am I affected by the Mytheresa breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the Mytheresa leak.