CRITICAL 9.8 NVD
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 tar
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).
References
- https://go.dev/cl/847305
- https://go.dev/issue/81739
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
- https://pkg.go.dev/vuln/GO-2026-6604
This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-10-08 via NVD.
Risk Timeline
CVE Disclosed2026-10-08 · 3 days ago
Remediation Resources
Official Advisory
pkg.go.dev/vuln/GO-2026-6604Analysis & PoC
go.dev/cl/847305Analysis & PoC
go.dev/issue/81739
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