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Vulnerability record · CVE-2026-39822 · published 8 July 2026

CVE-2026-39822: Golang go vulnerability

Golang · Go

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.

7.8 CVSS 3.1 High EPSS 0.18% · top 93.0% CWE-61 · CWE-61
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://go.dev/cl/797880 Patch
https://go.dev/issue/79005 Issue TrackingPatch
https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc Mailing ListPatchVendor Advisory
https://pkg.go.dev/vuln/GO-2026-4970 Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-39822), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.