Root.Mkdir(All) can follow junctions out of the root on Windows in os

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).

Source published

8 Oct 2026 22:53:58 UTC

Source modified

9 Oct 2026 15:36:01 UTC

Observed here

23 Oct 2026 15:48:27 UTC

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