CVE-2026-42503

The gopls language server (part of golang.org/x/tools ) contains a vulnerability where it may inadvertently bind to 0.0.0.0 (INADDR_ANY) when debugging flags are used. Specifically, if the -port flag is used, or if the -listen flag is provided without an explicit host (such as :8080), the service...

CVE-2026-42503 Accidental binding to INADDR_ANY might lead to RCE in golang.org/x/tools/gopls

gopls by default communicates via pipe. However, -port and -listen flags are supported as means of debugging. If -listen is given a value without an explicit host e.g. :8080, or -port is used, gopls will listen on 0.0.0.0. As a result, users might inadvertently cause gopls to bind 0.0.0.0. This...