Coinbase

Disclosed Sep 27, 20214 years ago6,159 affectedConfirmed

Official notice

What is known

People affected	6,159 (as reported by the organization)
Disclosed	Sep 27, 2021
Happened	Mar 17, 2021
Attack	Not stated
Data exposed	Not stated
Sector	Finance · US
Status	Confirmed

Sources

Source	Kind
California Attorney General breach notice: Coinbaseoag.ca.gov · Official notice	Official notice
Indiana Attorney General 2021 data breach report: Coinbasein.gov · Official notice	Official notice

Notices filed

Where	Filed	People
California AGresidents of CA	Sep 27, 2021
Indiana AGresidents of IN	Sep 27, 2021	78

Other breaches at Coinbase

Breach	Disclosed	Attack	Sector	Status	Affected
Coinbase confirms contractor improperly accessed data of about 30 customersDec 11, 20259 months agoInsider	Dec 11, 20259 months ago	Insider	Crypto	Confirmed	32
Bribed support contractors leak Coinbase customer data, $20M extortionMay 14, 20251 year agoInsider	May 14, 20251 year ago	Insider	Crypto	Confirmed	69K

History of this record

2026-09-25 · records_basis: empty to organization · backfill source
2026-09-25 · records: empty to 6159 · backfill source
2026-09-25 · added · backfill source

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

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