MrMax app and online store member data breach
Add to my breach checkMade public
What leaked4
Hard to replace
- Mobile number
- Email address
- Other profile data
Permanent
- Full name
- Mobile numberphone number · type not stated
- Other profile datamember ID; the leaked items differ by what each member registered
To-dos1 · about 5 min in all
What happened next11 events
- UndetectedNone on record
- Response 11 eventsNotice in 3 days · show events
- RemedyNone on record
- PenaltyNone on record
- DisputesNone on record
- No misuse of the leaked data found as of the notice
- Set up an email contact for questions about the incident
- Said it would email each affected member individually
- Apologised in its notice
- Announced that member data had leaked: up to 1,735,154 members
6 more
- Blocked access from outside the same day
- Suspended the MrMax app and online store right after finding the access
- Found suspicious access to its servers in the evening
- Closed the access route and stepped up monitoring; investigation with outside specialists
- Consulted the police
- Reported to the Personal Information Protection Commission
- Company
- MrMax
- Company detected it
- Made public
- Notice
- Leak confirmed
- Affected
- 1,735,154 MrMax app and online store members at most, registered as of October 3, 2026 · company notice
Sources
- ミスターマックス company notice (opens in a new tab)checked October 27, 2026