Arbitrary file read via symlink traversal
Published May 28, 2026 · Updated Aug 16, 2026
Path traversal in KubeVirt virt-exportserver in Red Hat OpenShift Virtualization 4 allows remote authenticated users to read pod files via VMExport. The dirHandler path uses Go's http.FileServer(http.Dir(mountPoint)), which follows symlinks from an exported filesystem PVC and serves targets outside the PVC root. Exploitation requires namespace-level access to control a filesystem PVC, create a VirtualMachineExport for it, and obtain the VMExport token; PVCs exported through raw or gzip endpoints are not exposed.
Summary
What happened
Path traversal in KubeVirt virt-exportserver in Red Hat OpenShift Virtualization 4 allows remote authenticated users to read pod files via VMExport. The dirHandler path uses Go's http.FileServer(http.Dir(mountPoint)), which follows symlinks from an exported filesystem PVC and serves targets outside the PVC root. Exploitation requires namespace-level access to control a filesystem PVC, create a VirtualMachineExport for it, and obtain the VMExport token; PVCs exported through raw or gzip endpoints are not exposed.
The record
- CVE
- CVE-2026-9804
- Published
- May 28, 2026
- Updated
- Aug 16, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Container Native Virtualization 4.20
- Classifications
- CWE-59, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 16, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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