CVE-2025-22873

LOW3.8

Improper access to parent directory of root in os

Published Feb 4, 2026

Modified 1 months ago

Details

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.

References

WEB

http://www.openwall.com/lists/oss-security/2025/05/06/2

WEB

https://go.dev/cl/670036

WEB

https://go.dev/issue/73555

WEB

https://groups.google.com/g/golang-announce/c/UZoIkUT367A/m/5WDxKizJAQAJ

WEB

https://pkg.go.dev/vuln/GO-2026-4403

ADVISORY