GO-2026-4970
Root escape via symlink plus trailing slash in os
At a glance
- Published
- Updated
- CVE
- CVE-2026-39822
- Aliases
- BIT-golang-2026-39822
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.
Affected packages
| Package | Versions |
|---|---|
| Go · stdlib | introduced 0, fixed 1.25.12, introduced 1.26.0-0, fixed 1.26.5, introduced 1.27.0-0, fixed 1.27.0-rc.2 |
References
- https://go.dev/issue/79005 REPORT
- https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc WEB
- https://go.dev/cl/797880 FIX
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |