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CVE-2026-56857

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

Description (CNA)

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).

Affected (CNA)

Vendor / productVersions
Go standard library / osaffected 0 before 1.26.9; affected 1.27.0-0 before 1.27.2
Go standard library / internal/syscall/windowsaffected 0 before 1.26.9; affected 1.27.0-0 before 1.27.2

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.