All Breaches
June 1, 2011 Verified Cryptocurrency / Exchange

MtGox Data Breach

The MtGox data breach refers to the leak of account data that occurred after unauthorized access to the user database of one of the most well-known Bitcoin exchanges at the time in June 2011.

42.2 Thousand
Reported Records
4
Data Types
Medium
Severity
Yes
Verification

Exposed Data Types

4
Email addresses
Usernames
Account numbers
Passwords

Additional Information

Added DateApril 30, 2024
Breach DateJune 1, 2011
Domainmtgox.com
SourceHistorical cryptocurrency exchange user database leak
Last Content UpdateJuly 29, 2026

Verification and editorial method

LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.

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Company Information

Company NameMtGox
SectorCryptocurrency / Exchange
CountryJapan
Websitewww.mtgox.com

Risk Level

Medium

The reported impact exceeds 10 thousand and falls within the medium severity band.

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