CVE-2026-9804
Kubevirt: kubevirt: vmexport directory symlink escape enables exporter pod file read
At a glance
- Severity
- HIGH 7.7
- EPSS
- EPSS 0.52 % · percentile 44 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Awaiting Analysis
Description
A flaw was found in KubeVirt's virt-exportserver component. An attacker with specific namespace-level access can exploit a path traversal vulnerability in the VMExport directory endpoint. By placing a symbolic link (symlink) within an exported filesystem Persistent Volume Claim (PVC) that points outside its designated mount root, the attacker can read arbitrary files from the exporter pod's filesystem. This leads to information disclosure, potentially exposing sensitive data.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | redhat |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | redhat-SADP |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-mpmf-3w4r-qfpf — KubeVirt has a Link Following issue
- GO-2026-5883 — KubeVirt has a Link Following issue in kubevirt.io/kubevirt
European references
- ENISA EUVD · EUVD-2026-32748
- GCVE · GCVE-0-2026-9804
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat Container Native Virtualization 4.17 | unaffected 1781757410 < * |
| Red Hat · Red Hat Container Native Virtualization 4.18 | unaffected 1781928221 < * |
| Red Hat · Red Hat Container Native Virtualization 4.19 | unaffected 1781590993 < * |
| Red Hat · Red Hat Container Native Virtualization 4.20 | unaffected 1781838712 < * |
| Red Hat · Red Hat Container Native Virtualization 4.21 | unaffected 1782012918 < * |
| Red Hat · Red Hat OpenShift Virtualization 4 |
References
- https://access.redhat.com/errata/RHSA-2026:27903
- https://access.redhat.com/errata/RHSA-2026:27913
- https://access.redhat.com/errata/RHSA-2026:27914
- https://access.redhat.com/errata/RHSA-2026:27983
- https://access.redhat.com/errata/RHSA-2026:28002
- https://access.redhat.com/security/cve/CVE-2026-9804
- https://bugzilla.redhat.com/show_bug.cgi?id=2482487
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9804.json
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |