All Breaches
October 12, 2021 Verified Cryptocurrency market data platform

CoinMarketCap Data Breach

The CoinMarketCap data breach record concerns the circulation of 3,117,548 email addresses associated with the cryptocurrency market data platform online on October 12, 2021.

3.1 Million
Reported Records
1
Data Types
Critical
Severity
Yes
Verification

Exposed Data Types

1
Email addresses

Additional Information

Added DateOctober 22, 2021
Breach DateOctober 12, 2021
Domaincoinmarketcap.com
SourceThird party breach
Last Content UpdateJuly 18, 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 NameCoinMarketCap
SectorCryptocurrency market data platform
CountryUnited States
Websitecoinmarketcap.com

Risk Level

Critical

The reported impact exceeds 1 million and falls within the critical severity band.

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