CVE-2026-56857 — 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 tha…
Published: 2026-10-08 · CVSS: 9.8 · CVSS 3.1
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: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7