A very short while ago, Bitcoin ABC (the most popular client software for Bitcoin Cash) reported that a vulnerability within the node software had been identified, and that the necessary steps had already been taken to mitigate the issue. The incident allowed an attacker to form a malicious transaction, exploiting the vulnerability in the Bitcoin ABC client, potentially causing a split in the network. Bitcoin ABC nodes would have effectively mined the transaction into a block that all other implementations of the node software would reject, causing an unintended split. This has occurred twice in the history of bitcoin so far but to date no such incident has occurred on BCH. With respect to the mitigation actions taken by Bitcoin ABC, Stefan Matthews, CEO of BMG Operations (nChain’s affiliated mining business) states: “We are pleased that the Bitcoin ABC team responded to this software bug with an exemplary level of professionalism – by determining a rapid response strategy to eli...