Vulnerability in Go Standard Library Internal/syscall/windows

CVE-2026-56857

On Windows, when the target of Root.Mkdir or Root.MkdirAll is a junction pointing to an empty location, the operation can create a directory at the junction target even when that target is located outside the root. This only applies to operations where the last path component is a junction (path/to/junction, but not path/junction/target).

Published 2026-10-08 · last modified 2026-10-09.