CVE-2026-39822
Last modified
CVE-2026-39822 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Golang | Go | < 1.25.12 | — |
| Golang | Go | >= 1.26.0, < 1.26.5 | — |
| Golang | Go | 1.27 | Rc1 |
References
- https://go.dev/issue/79005Issue Tracking, Patch
- https://groups.google.com/g/golang-announce/c/OrmQE_Yp5ScMailing List, Patch, Vendor Advisory
- https://pkg.go.dev/vuln/GO-2026-4970Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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