NewsNovo

Coinkite warns Coldcard Mk3 users as 594 BTC theft reports raise fund safety concerns

7/31/2026

Reports of 594 $BTC in stolen funds have surfaced alongside a formal warning from Coinkite, the maker of the Coldcard hardware wallet, directed at users of its Mk3 model.

The company says funds may be at risk and has issued a specific remediation step: generate a strong, unique BIP-39 passphrase on the Mk3 device and transfer holdings to the wallet that passphrase creates.

What the warning requires Coinkite's guidance is narrow and action-oriented. Create a strong, unique BIP-39 passphrase. Move funds to the resulting wallet.

What the company has not specified, at least per the available disclosure, is the precise vulnerability or failure mode that produced the reported losses.

Keep reading

Read the full story

Open on NewsNovo