CVE-2025-22873

Improper access to parent directory of root in os

Low · published February 4, 2026

CVSS v3.1
3.8
EPSS
0%
Percentile
13.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.8 · LOW
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00236 · 13.8th percentile
Published
2026-02-04T23:05Z
EPSS history
Timeline
  • 04 FEB 23:05Z
    Improper access to parent directory of root in os
    cvelistv5