Encrypted currency developers and Cornell University professor Emin Gün Sirer recently said that the lightning network is insecure and reveals user privacy. Last weekend, developer Rusty Russell said on Twitter that it found a lightning network security vulnerability that could lead to financial losses, which has not yet been resolved. Sirer said that the vulnerability is a "small, easy-to-repair security vulnerability." The vulnerability itself is not important. The main problem is not that the lightning network has a vulnerability, but the entire lightning network fundamentally leaks private payment information and routing information.