In Untersuchung

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.

Zuletzt aktualisiert: 2026-11-09

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Überblick

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).

Zeitlicher Ablauf

UnbekanntVorfall
2026-10-30Entdeckt
2026-11-03Bekanntgegeben

Reaktion der Organisation

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

Was Sie tun können

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.

Quellen

【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

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

Überblick

Zeitlicher Ablauf

Reaktion der Organisation

Was Sie tun können

Quellen

Zugehörige Informationen

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