Root escape via symlink plus trailing slash in os
Published Jul 8, 2026 · Updated Oct 23, 2026 · Also known as BIT-golang-2026-39822, GO-2026-4970
Original summary
Normalized public record · Updated Oct 23, 2026
Root escape via symlink plus trailing slash in os
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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 /.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- BIT-golang-2026-39822, GO-2026-4970
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Jul 8, 2026 · Last refreshed Oct 23, 2026