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CVE-2026-39822

Root escape via symlink plus trailing slash in os

Published: Jul 8, 2026Updated: Jul 13, 2026 Sources: CVE List NVDCWE-61
7.8HIGH
NVD MITRE
EPSS Score
0.2%
Top 85.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-61

Affected Products

golang
oss-project·US
go
OSS Libraries
Go standard library
oss-project·USaka golang standard library, html/template, net/http, crypto/x509
osLibraryLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available
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References

https://go.dev/cl/797880
go.dev
https://go.dev/issue/79005
go.dev
https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc
groups.google.com
and 1 more references View all →

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