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CVE-2026-13218

A flaw was found in KubeVirt's virt-handler network cache handling. The WriteToCachedFile function writes data to a launcher-rooted path using os.WriteFile and os.Chown without symlink protection. A user with access to the virt-launcher container can plant a symlink at the cache file path, causing virt-handler to follow it and overwrite an arbitrary host file with JSON content and change its ownership.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c6d2fa8757ede16d44ba3c193a628d1081fed195b5c631415876c8752615cd73
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:container_native_virtualization:4"],"defaultStatus":"affected","packageName":"container-native-virtualization/virt-handler-rhel9","product":"Red Hat OpenShift Virtualization 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:container_native_virtualization:4"],"defaultStatus":"affected","packageName":"container-native-virtualization/virt-handler","product":"Red Hat OpenShift Virtualization 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:container_native_virtualization:4"],"defaultStatus":"affected","packageName":"container-native-virtualization/virt-handler-rhel9","product":"Red Hat OpenShift Virtualization 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:container_native_virtualization:4"],"defaultStatus":"affected","packageName":"container-native-virtualization/virt-handler","product":"Red Hat OpenShift Virtualization 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-61","description":"UNIX Symbolic Link (Symlink) Following","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-13218"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/references/0
{"name":"RHBZ#2492654","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492654"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a90f9a650ad95362db585ec23d5d0cd181d0ad3b086f6f01265a44a2db03cca8 · sha256:d4d8051bd80f5a5b… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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