CVE-2026-27139 - Vulnerability Details - OpenCVE

On Unix platforms, when listing the contents of a directory using File.ReadDir or File.Readdir the returned FileInfo could reference a file outside of the Root in which the File was opened. The impact of this escape is limited to reading metadata provided by lstat from arbitrary locations on the filesystem without permitting reading or writing files outside the root.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Go Standard Library	Os

No data.

No data.

References

Link	Providers
https://go.dev/cl/749480
https://go.dev/issue/77827
https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
https://pkg.go.dev/vuln/GO-2026-4602

History

Mon, 09 Mar 2026 15:30:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 2.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 09 Mar 2026 10:15:00 +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

Fri, 06 Mar 2026 21:45:00 +0000

Type	Values Removed	Values Added
Description		On Unix platforms, when listing the contents of a directory using File.ReadDir or File.Readdir the returned FileInfo could reference a file outside of the Root in which the File was opened. The impact of this escape is limited to reading metadata provided by lstat from arbitrary locations on the filesystem without permitting reading or writing files outside the root.
Title		FileInfo can escape from a Root in os
References		https://go.dev/cl/749480 https://go.dev/issue/77827 https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk https://pkg.go.dev/vuln/GO-2026-4602

MITRE

Status: PUBLISHED

Assigner: Go

Published: 2026-03-06T21:28:14.451Z

Updated: 2026-03-09T14:53:58.363Z

Reserved: 2026-02-17T19:57:28.435Z

Link: CVE-2026-27139

Vulnrichment

Updated: 2026-03-09T14:53:42.735Z

NVD

Status : Awaiting Analysis

Published: 2026-03-06T22:16:01.070

Modified: 2026-03-09T15:15:57.150

Link: CVE-2026-27139

Redhat

No data.

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