On October 26, a vulnerability was discovered in a Bitcoin wallet that allowed attackers to steal funds when users attempted to speed up transactions by increasing fees. Attackers exploited this flaw by using rogue servers to replace legitimate transactions with fraudulent ones while waiting for user approval. Developers confirmed at least one instance of theft before a security patch was released to fix the vulnerability.
Electrum wallet developers released version 4.8.3 to fix a software bug in the transaction speed-up feature that allowed malicious servers to intercept and redirect funds.
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