Coldcard Bitcoin wallet security flaw leads to massive theft
Story essentials
Coinkite Inc.
Global
July 29, 2026
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COMPAMIR Editorial Team
The COMPAMIR editorial team brings together public reporting and links to the original coverage. We update the page as new information emerges.
Read our editorial policy- Earlier version 18/3/2026, 7:40:35 AM
A software flaw in Coinkite's Coldcard devices allowed attackers to predict seed phrases. Approximately 1,367 Bitcoin worth $86 million were stolen from over 4,500 wallets. Coinkite has released fixed firmware for affected models.
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