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.
History

Wed, 11 Feb 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 10 Feb 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Golang
Golang go
CPEs cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
Vendors & Products Golang
Golang go

Thu, 05 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-23
Metrics cvssV3_1

{'score': 3.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 05 Feb 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library os
Vendors & Products Go Standard Library
Go Standard Library os

Wed, 04 Feb 2026 23:30:00 +0000

Type Values Removed Values Added
References

Wed, 04 Feb 2026 23:15:00 +0000

Type Values Removed Values Added
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.
Title Improper access to parent directory of root in os
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published: 2026-02-04T23:05:24.803Z

Updated: 2026-02-05T15:03:55.451Z

Reserved: 2025-01-08T19:11:42.835Z

Link: CVE-2025-22873

cve-icon Vulnrichment

Updated: 2026-02-04T23:08:02.625Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-04T23:15:54.220

Modified: 2026-02-10T15:16:40.057

Link: CVE-2025-22873

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-02-04T23:05:24Z

Links: CVE-2025-22873 - Bugzilla