84K records in April 2026. Check whether your email is in this file — then read what was taken and what to do.
84K
Records exposed
2026
Year
7
Data types
Free
To check
Quick answer — was Mytheresa breached?
Yes. Mytheresa was breached in April 2026, exposing 84,108 records including email addresses, names, partial credit card data. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
What happened in the Mytheresa data breach?
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.
The exposed data included 7 types of personal information. Learn more about what a data breach means for you.
Why was the Mytheresa breach so dangerous?
The Mytheresa breach exposed 84,108 records.
If you used Mytheresa, check whether your email was exposed in this breach.
What data was stolen in the Mytheresa breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Names — used to build profiles and target you with personalised scams
Partial credit card data — can be used for direct financial fraud and unauthorised transactions
Phone numbers — enables SIM-swapping attacks and targeted SMS phishing
Physical addresses — combined with other data, used for identity theft and physical fraud
Purchases — may be combined with other breach data to build a profile for targeted attacks
Salutations — may be combined with other breach data to build a profile for targeted attacks
Is the Mytheresa breach still dangerous in 2026?
Yes. Stolen data from the Mytheresa breach remains dangerous years after the incident. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2026 are still actively used in automated attacks today.
Personal information like email addresses, phone numbers, and dates of birth does not expire. Even if you changed your Mytheresa password, the other exposed data can be combined with information from other breaches to target you. Learn how long stolen data stays dangerous.
What to do if your email was in the Mytheresa breach
1
Change your Mytheresa password immediately
Log into Mytheresa and change your password to something strong and unique — one you have never used anywhere else. A password manager after a breach can generate and store a unique password so you never reuse one.
2
Change any account sharing that password
If you reused this password elsewhere, walk the password-reuse change checklist. You can also check whether that password appears in known leaks without sending the password itself.
3
Enable two-factor authentication
Turn on 2FA or a passkey after a breach on Mytheresa and every important account. Even if your password is known, attackers cannot sign in without the second factor.
4
Check your other accounts for this breach
Run a full email scan to see every breach your address appears in — not just this one. Then follow the after-breach playbook. If a password from this incident is still in use, check it without sending the password itself.
Check all my breaches — free5
Shrink people-search listings if your name or address was exposed
A leaked email plus a public people-search page makes phishing more convincing. That is a separate job from changing passwords. See the data broker opt-out guide for official forms and, if you want help, removal services.
Frequently asked about the Mytheresa breach
How many people were affected by the Mytheresa data breach?
Approximately 84,108 user records were exposed in the Mytheresa breach in April 2026.
Is the Mytheresa breach still a risk in 2026?
Yes. Leaked credentials are actively used in credential-stuffing attacks years after a breach. If you reused your Mytheresa password elsewhere and have not changed it, those accounts remain at risk today.
How do I check if my email was in the Mytheresa breach?
Enter your email in the free checker on EmailLeaked. We scan millions of breach records including the Mytheresa dataset and tell you instantly whether your email was exposed and what data was taken.
What should I do if I was in the Mytheresa breach?
Change your Mytheresa password immediately, update any account where you used the same password, and enable two-factor authentication on all important accounts. Use a unique password for every account — a password manager makes this straightforward — and monitor for phishing emails over the next 90 days.
How this breach page is reviewed
Breach pages are built from structured breach records and reviewed for practical risk guidance by EmailLeaked. Risk labels reflect exposed data types and are intended to help readers prioritise action.
Other major breaches
Was your email in this breach?
Check if your email appeared in the Mytheresa breach and 1033+ other known breaches — free, instant, no signup.
Check my email — freeWas my email hacked?
Check if your email is compromised in seconds. Free, private, no signup. Scan millions of breach records across 1034+ known breaches.
Check my email now — it's freeNo signup required · Results in under 5 seconds · Your data is never stored