[Electrum 4.8.3 Fixes Security Vulnerability That Could Trick Users into Signing Stolen Transactions] According to Bitcoin News, Electrum released version 4.8.3 on October 24, 2026, fixing a security vulnerability that had been used in a real attack. A malicious server could present users with forged transactions and then trick them into signing a transaction to an attacker's address when they tried to expedite the transaction using Alternate Fees (RBF); the attacker did not need to obtain the user's private key. Electrum stated that it had received two related reports, one of which involved a user losing Bitcoin after the fees were increased, and recommended that users update to version 4.8.3.