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Response snapshot Oct 26, 2026, 23:11 UTC

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Disclosed incidenthibp-mytheresa

Mytheresa breach: 84,108 accounts exposed

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.

At a glance

Sources
1 source

What to do

If you or your organization used this service, change reused passwords, watch for phishing that uses the exposed data, and check the disclosure for the organization's guidance.

Read Have I Been Pwned: Mytheresa (opens a new tab)

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.

Related technology

Sources

  1. Primary source

    Have I Been Pwned: Mytheresa (opens a new tab)

    Verified breach loaded into Have I Been Pwned: account count, exposed data types, and dates.

    Published Checked

  2. Primary source

    Have I Been Pwned breach API (opens a new tab)

    The breach list that supplied this entry.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, May 27). Mytheresa breach: 84,108 accounts exposed. https://kevwire.com/record/hibp-mytheresa

MLA

"Mytheresa breach: 84,108 accounts exposed." KEVWire, 27 May 2026, kevwire.com/record/hibp-mytheresa.

Chicago

KEVWire. "Mytheresa breach: 84,108 accounts exposed." Last modified May 27, 2026. https://kevwire.com/record/hibp-mytheresa.

Evidence summary (plain text)

Mytheresa breach: 84,108 accounts exposed (May 27, 2026).
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.
Sources:
Have I Been Pwned: Mytheresa: https://haveibeenpwned.com/Breach/Mytheresa
Have I Been Pwned breach API: https://haveibeenpwned.com/api/v3/breaches
Record ID: hibp-mytheresa.
Record origin: Ingested record.
AI evidence: Not assessed.
About this data

This record was ingested from a data source. Retrieved: Oct 26, 2026, 22:25 UTC. Ingestion is not an independent editorial investigation.

Verified by Have I Been Pwned. Breach date: 2026-04-12; loaded 2026-05-27. Exposed data: Email addresses, Names, Partial credit card data, Phone numbers, Physical addresses, Purchases, Salutations. Counts are accounts in the loaded data, not necessarily distinct people.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

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