Vulnerability in Red Hat Container Native Virtualization 4.17
CVE-2026-9804
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.005 · change: -0.002
Affected products
- Red Hat Container Native Virtualization 4.17 — versions 1781757410
- Red Hat Container Native Virtualization 4.18 — versions 1781928221
- Red Hat Container Native Virtualization 4.19 — versions 1781590993
- Red Hat Container Native Virtualization 4.2 — versions 1781838712
- Red Hat Container Native Virtualization 4.20 — versions 1781838712
- Red Hat Container Native Virtualization 4.21 — versions 1782012918
- Red Hat Openshift Virtualization 4
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-9804 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:27914 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:27983 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:28002 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:27903 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:27913 (vendor-advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-9804?
- CVE-2026-9804 is a high-severity vulnerability in Red Hat Container Native Virtualization 4.17, classified under Improper Link Resolution Before File Access. CVSS score: 7.7/10. Published 2026-05-28.
- How severe is CVE-2026-9804?
- High severity. CVSS v3 base score is 7.7 out of 10.