Investigating

Mazda Hospital: data of 626 patients may have leaked after imaging contractor cloud misconfiguration

Possible data leak: An imaging contractor mis-set cloud sharing so files were readable by unauthorised parties from early April 2023 to mid-December 2024; disclosed April 23, 2026.

Last updated: 2026-11-09

Overview

626 people: patient ID, name (roman/kana), study date, modality and region. No diagnoses, results or images.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. 個人情報漏えいのおそれに関するお知らせとお詫びマツダ病院 · 2026-11-09

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