Confirmed

SourceNext: 22,519,960 member records leaked via abuse of member-data API

SourceNext found and contained unauthorised access to its member system on October 13 and determined that a member-data API had been abused since October 9 to obtain member data.

Last updated: 2026-11-09

Overview

22,519,960 records; fields vary by registration and include emails, passwords, names, addresses, gender, phones, birth dates and company details (listed by the company as all possibly affected fields). No card data in the system.

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. 当社サイトへの不正アクセスによるお客様情報流出のお詫びとお知らせソースネクスト株式会社 · 2026-11-09

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