CVE-2025-22873

Summary

It was possible to improperly access the parent directory of an os.Root by opening a filename ending in "../". For example, Root.Open("../") would open the parent directory of the Root. This escape only permits opening the parent directory itself, not ancestors of the parent or files contained within the parent.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://go.dev/cl/670036 ↗

Additional information

• NVD record
• https://go.dev/cl/670036Patch
• https://go.dev/issue/73555Advisory
• https://pkg.go.dev/vuln/GO-2026-4403Advisory
• https://groups.google.com/g/golang-announce/c/UZoIkUT367A/m/5WDxKizJAQAJ
• http://www.openwall.com/lists/oss-security/2025/05/06/2Advisory