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TI-2026-08592 Aliases CVE-2026-9804GHSA-mpmf-3w4r-qfpf

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

Priority LOW 34CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 5 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-59 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00516 44th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 5 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Container Native Virtualization 4.17—1781757410Patch availableCNA
Red HatRed Hat Container Native Virtualization 4.18—1781928221Patch availableCNA
Red HatRed Hat Container Native Virtualization 4.19—1781590993Patch availableCNA
Red HatRed Hat Container Native Virtualization 4.20—1781838712Patch availableCNA
Red HatRed Hat Container Native Virtualization 4.21—1782012918Patch availableCNA
Red HatRed Hat OpenShift Virtualization 4——No fix listedCNA
—kubevirt.io/kubevirt (Go)up to 1.9.0-beta.0—No fix listedGHSA-mpmf-3w4r-qfpf
  • Red Hat Container Native Virtualization 4.17 VendorRed Hat Affected — Fixed in 1781757410 Patch available CNA
  • Red Hat Container Native Virtualization 4.18 VendorRed Hat Affected — Fixed in 1781928221 Patch available CNA
  • Red Hat Container Native Virtualization 4.19 VendorRed Hat Affected — Fixed in 1781590993 Patch available CNA
  • Red Hat Container Native Virtualization 4.20 VendorRed Hat Affected — Fixed in 1781838712 Patch available CNA
  • Red Hat Container Native Virtualization 4.21 VendorRed Hat Affected — Fixed in 1782012918 Patch available CNA
  • Red Hat OpenShift Virtualization 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • kubevirt.io/kubevirt (Go) Vendor— Affected up to 1.9.0-beta.0 Fixed in — No fix listed GHSA-mpmf-3w4r-qfpf

CPE names CNA · 6

CPEVersionsRoleVendor
cpe:/a:redhat:container_native_virtualization:4.17::el94.17—Red Hat
cpe:/a:redhat:container_native_virtualization:4.18::el94.18—Red Hat
cpe:/a:redhat:container_native_virtualization:4.19::el94.19—Red Hat
cpe:/a:redhat:container_native_virtualization:4.20::el94.20—Red Hat
cpe:/a:redhat:container_native_virtualization:4.21::el94.21—Red Hat
cpe:/a:redhat:container_native_virtualization:44—Red Hat
  • cpe:/a:redhat:container_native_virtualization:4.17::el9 Versions 4.17 — ·Red Hat
  • cpe:/a:redhat:container_native_virtualization:4.18::el9 Versions 4.18 — ·Red Hat
  • cpe:/a:redhat:container_native_virtualization:4.19::el9 Versions 4.19 — ·Red Hat
  • cpe:/a:redhat:container_native_virtualization:4.20::el9 Versions 4.20 — ·Red Hat
  • cpe:/a:redhat:container_native_virtualization:4.21::el9 Versions 4.21 — ·Red Hat
  • cpe:/a:redhat:container_native_virtualization:4 Versions 4 — ·Red Hat

Remediation

Red Hat 5 advisories

  • RHSA-2026:28002 Released 2026-06-22 · Red Hat rating Important
    OpenShift Virtualization v4.17 Images
    • Red Hat Container Native Virtualization 4.17 registry.redhat.io/container-native-virtualization/virt-exportserver-rhel9
  • RHSA-2026:27983 Released 2026-06-22 · Red Hat rating Important
    OpenShift Virtualization v4.20 Images
    • Red Hat Container Native Virtualization 4.20 registry.redhat.io/container-native-virtualization/virt-exportserver-rhel9
  • RHSA-2026:27914 Released 2026-06-22 · Red Hat rating Important
    OpenShift Virtualization v4.19 Images
    • Red Hat Container Native Virtualization 4.19 registry.redhat.io/container-native-virtualization/virt-exportserver-rhel9
Show 2 more Red Hat advisories
  • RHSA-2026:27913 Released 2026-06-22 · Red Hat rating Important
    OpenShift Virtualization v4.18 Images
    • Red Hat Container Native Virtualization 4.18 registry.redhat.io/container-native-virtualization/virt-exportserver-rhel9
  • RHSA-2026:27903 Released 2026-06-22 · Red Hat rating Important
    OpenShift Virtualization v4.21 Images
    • Red Hat Container Native Virtualization 4.21 registry.redhat.io/container-native-virtualization/virt-exportserver-rhel9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Virtualization 4AffectedNo fix yet
Red Hat Container Native Virtualization 4.17Fixed RHSA-2026:28002
Red Hat Container Native Virtualization 4.18Fixed RHSA-2026:27913
Red Hat Container Native Virtualization 4.19Fixed RHSA-2026:27914
Red Hat Container Native Virtualization 4.20Fixed RHSA-2026:27983
Red Hat Container Native Virtualization 4.21Fixed RHSA-2026:27903
Not affected: 5 products
  • Red Hat Container Native Virtualization 4.17
  • Red Hat Container Native Virtualization 4.18
  • Red Hat Container Native Virtualization 4.19
  • Red Hat Container Native Virtualization 4.20
  • Red Hat Container Native Virtualization 4.21

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9804
  2. 2026-10-03 Alias added: GHSA-mpmf-3w4r-qfpf
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 6

Other 5

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences