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CRITICAL2026-04-12via haveibeenpwned

🚨 Mytheresa Breach — 84K Accounts Exposed

Mytheresa suffered a data breach affecting 84K accounts. Here's what happened, what data was exposed, and what you should do right now.

84,108
ACCOUNTS
CRITICAL
SEVERITY
7
DATA TYPES

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.

Impact

  • Affected accounts: 84K
  • Data exposed: Email addresses, Names, Partial credit card data, Phone numbers, Physical addresses, Purchases, Salutations
  • Severity: CRITICAL
  • Source: [haveibeenpwned](https://haveibeenpwned.com/PwnedWebsites#Mytheresa)

    • What You Should Do

    If you have an account with Mytheresa, take these steps immediately:

  • **Change your password** — Use a unique, strong password (16+ chars with mixed case, numbers, symbols)
  • **Enable 2FA** — Turn on two-factor authentication if available
  • **Check your email** — Search for breach notifications from Mytheresa
  • **Monitor your accounts** — Watch for unauthorized access on any service where you reused the same password
  • **Scan your site** — If you run a website, [run a free ScanMyVibe scan](https://scanmyvibe.co/scan) to check if your own security headers and configurations protect against common attack vectors

    • Is Your Website Secure?

    Data breaches often exploit weak security configurations — missing Content-Security-Policy headers, misconfigured CORS, exposed API keys. These are exactly the issues ScanMyVibe detects in under 30 seconds.

    [Scan your site free →](https://scanmyvibe.co/scan)

    Timeline

  • 2026-04-12 — Breach reported
  • 2026-04-12 — ScanMyVibe breach alert published
  • Ongoing — Investigation in progress

    • This article is auto-generated by ScanMyVibe's breach monitoring system. Sources are verified but details may evolve as investigations progress. Last updated: 2026-05-27.

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