This Week in Bitcoin

116: Coldcard Wallets Compromised

July 31, 2026·13 min
Episode Description from the Publisher

An urgent warning for COLDCARD users: Coinkite says funds tied to seeds generated on some Mk3 devices may be at risk, and we examine why other hardware wallets could be next. Episode Links 🎉 Boost from the Web 🇺🇸 Buy Sats on River - The best way to stack in the US 🇨🇦 The Bitcoin Well - An amazing automatic self-custody Bitcoin platform 💳 The Bitcoin Company - Spending your Bitcoin Via Lightning 🏦 Fold Card - Pay bills Stack Sats 💵 SALT Lending - Get access to your BTC Value w/out Selling ⚡ Strike - Ultra-low fees, high trading limits, and easy loans. Show Notes Mk3 Security Advisory | COINKITE Blog Bitcoin News on X: "BITCOIN CORE DEVELOPER: “SORRY, THIS IS THE TIME TO PANIC” Nick Neuman on X: "It sounds like Mk4, Q, and Mk5 are also vulnerable in a different way than Mk3. Zero-Knowledge Goof (Loop master general) on X: "MK4s are vulnerable but are millions of times harder to steal from.

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