Description
On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing outside of the root.
Published: 2026-07-08
Score: 7.8 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Wed, 08 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-61
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

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

Wed, 08 Jul 2026 17:45:00 +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, 08 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Description On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing outside of the root.
Title Root escape via symlink plus trailing slash in os
References

Subscriptions

Go Standard Library Os
cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-07-08T19:39:17.341Z

Reserved: 2026-04-07T18:13:03.527Z

Link: CVE-2026-39822

cve-icon Vulnrichment

Updated: 2026-07-08T18:05:38.120Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-08T17:30:03Z

Weaknesses
  • CWE-61

    UNIX Symbolic Link (Symlink) Following