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Denny's Japan: member data may have leaked after unauthorised access to its app

Possible data leak: On October 30, 2026, Denny's Japan found that during the old-to-new app migration third parties had fraudulently created credentials and could access some accounts; it announced this on November 3.

最后更新: 2026-11-09

此内容以 English 显示。

概述

Possible fields: member codes, emails, birth dates, gender, prefecture, favourite stores and kids' birthday data. Names, addresses, phones, passwords and cards are not held. Headcount still under investigation (count blank).

时间线

  1. 发生
  2. 发现
  3. 披露

组织应对措施

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

用户应对建议

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.

信息来源

  1. 【重要】デニーズアプリへの不正アクセスに関するお詫びとお知らせ（第一報）株式会社デニーズジャパン · 2026-11-09

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