Bitcoin Wallet Bug: Why Speeding Up a Payment Could Drain Your Wallet

Most $Bitcoin thefts need your seed phrase. This one did not. A flaw in Electrum, one of the oldest Bitcoin wallets, let a malicious server replace a pending payment with a fake one and then wait for you to do something completely routine: speed it up. The moment you approved the higher fee, you signed the attacker’s transaction instead of your own. At least one user lost funds before the fix landed on October 24.