The package github.com/pires/go-proxyproto before 0.6.0 are vulnerable to Denial of Service (DoS) via creating connections without the proxy protocol header.
CVSS 3.1HIGH 7.5·Network·No auth·No interaction·EPSS 0.01648·Published 2021-07-21·Fixed in 0.6.0, 0.6.1CWE-400