BreachCensus

Coinbase, Inc

United States of America

Coinbase, Inc is an organisation in Massachusetts. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register and the Washington State Attorney General breach-notification register with 4 confirmed incidents; the most recent notice was filed on May 20, 2025.

Data as of September 12, 2026.

Confirmed incident

Filed in WA, CA and MA — Hacking/IT Incident

The same incident was filed separately with 3 jurisdictions within a few days of each other (WA, CA and MA) — shown here as one incident.

Occurred
December 26, 2024
Disclosed
May 20, 2025

Timeline

  1. May 20, 2025
    Reported to regulator Regulator

    WA AG breach notification: 3,337 Washington residents affected

    source
  2. May 20, 2025
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
  3. May 20, 2025
    Reported to regulator Regulator

    MA AG breach notification: 2,050 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
What a Washington notice means

Governed by RCW 19.255.010. Notice to the Attorney General is required when a breach affects more than 500 Washington residents.

Note: the count is Washington residents only, not a total.

Washington breach-notification register ↗

What a California notice means

Governed by Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗

What a Massachusetts notice means

Governed by M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗

Confirmed incident

US-MA

Disclosed
July 16, 2024

Timeline

  1. July 16, 2024
    Reported to regulator Regulator

    MA AG breach notification: 2 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-MA

Disclosed
October 13, 2021

Timeline

  1. October 13, 2021
    Reported to regulator Regulator

    MA AG breach notification: 98 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-CA

Occurred
March 17, 2021
Disclosed
September 27, 2021

Timeline

  1. September 27, 2021
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.