According to a report by OpenSourceMalware cybersecurity researchers on October 30, version 2.1.313 of the Claude Code extension in the Open VSX Extension Registry was found to contain a hidden backdoor that allows remote access to infected computers and remains active even after a restart. While the attack is not specifically aimed at crypto users, blockchain developers may face the risk of sensitive information leakage, such as private keys, wallet credentials, and exchange API keys. The findings do not prove that Anthropic's official VS Code Marketplace version or its broader distribution systems were compromised.