CVE-2025-22873

Improper access to parent directory of root in os

State: Published
Severity: 3.8 Low
Published: Feb 4, 2026
Updated: Feb 5, 2026
Reserved: Jan 8, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	3.8 Low	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N	CISA-ADP

Weaknesses

CWE-23 Relative Path Traversal

Affected Products

Product	Versions
osGo standard library	before 1.23.9Affected 1.24.0-0 to before 1.24.3Affected

References

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

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