[Contained][Severity: Critical][Intrusion]

Burger King: app member data leaked

The member system of the official app was accessed without authorization from 2 to 7 October, leaking about 11.18 million member records. No card numbers are held and no password leak was found.

Disclosed

2026-10-15

Organizations involved

Leaked or at risk

11.2M

11,180,000

Downtime

Unknown

Timeline

Started 2026-10-02
Detected 2026-10-13
Disclosed 2026-10-15
13 days

Attack or cause

Method: [Intrusion]
Impact: [Data leak]
Entry point: Unknown

Data exposed or at risk

[Name][E-mail address][Phone number][Gender][Date of birth][Postal address]

Organizations involved

[Breached][Critical]Tokyo, ChiyodaAccommodation, food and drink11,180,000 leaked
BK Japan Inc.

						Note
BK Japan Inc.	[Breached]	[Critical]	Tokyo, Chiyoda	Accommodation, food and drink	11,180,000

Open in organization search

Sources

[1][News]バーガーキング、公式アプリの会員情報約1118万件が不正アクセスにより漏えいINTERNET Watch · 2026-10-15
[2][News]バーガーキングで会員情報漏えい　不正アクセス、1118万件Kyodo News · 2026-10-15