Kubevirt: kubevirt: vmexport directory symlink escape enables exporter pod file read

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Summary

CVECVE-2026-9804
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 09:16:49 UTC
Updated2026-07-15 01:17:11 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS: 0.005150000 probability, percentile 0.401030000 (date 2026-07-04)

Problem Types: CWE-59 | CWE-59 Improper Link Resolution Before File Access ('Link Following')

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1[email protected]Secondary7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNACVSS7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Container Native Virtualization 4.17 unaffected 1781757410 * rpm Not specified
CNA Red Hat Red Hat Container Native Virtualization 4.18 unaffected 1781928221 * rpm Not specified
CNA Red Hat Red Hat Container Native Virtualization 4.19 unaffected 1781590993 * rpm Not specified
CNA Red Hat Red Hat Container Native Virtualization 4.20 unaffected 1781838712 * rpm Not specified
CNA Red Hat Red Hat Container Native Virtualization 4.21 unaffected 1782012918 * rpm Not specified
CNA Red Hat Red Hat OpenShift Virtualization 4 Not specified Not specified
ADP Red Hat Red Hat Container Native Virtualization 4.17 unaffected 1781757410 * rpm Not specified
ADP Red Hat Red Hat Container Native Virtualization 4.18 unaffected 1781928221 * rpm Not specified
ADP Red Hat Red Hat Container Native Virtualization 4.19 unaffected 1781590993 * rpm Not specified
ADP Red Hat Red Hat Container Native Virtualization 4.20 unaffected 1781838712 * rpm Not specified
ADP Red Hat Red Hat Container Native Virtualization 4.21 unaffected 1782012918 * rpm Not specified
ADP Red Hat Red Hat OpenShift Virtualization 4 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:27914 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/security/cve/CVE-2026-9804 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:27983 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:27903 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:27913 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9804.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
access.redhat.com/errata/RHSA-2026:28002 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Thai Son Dinh, GitHub: @sondt99 (VinSOC) for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-18T00:00:00.000ZReported to Red Hat.
CNA2026-05-28T06:00:00.000ZMade public.
ADP2026-05-18T00:00:00.000ZReported to Red Hat.
ADP2026-05-28T06:00:00.000ZMade public.

Solutions

ADP: RHSA-2026:28002: Red Hat Container Native Virtualization 4.17

ADP: RHSA-2026:27913: Red Hat Container Native Virtualization 4.18

ADP: RHSA-2026:27914: Red Hat Container Native Virtualization 4.19

ADP: RHSA-2026:27983: Red Hat Container Native Virtualization 4.20

ADP: RHSA-2026:27903: Red Hat Container Native Virtualization 4.21

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