CVE-2026-13218
mediumpriority · track · 0EPSS 0.001 · 3 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.9–4.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
- redhat openshift virtualization4 → 4.22.0nvdUScpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/CVE-2026-13218cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2492654cnnvd
- https://access.redhat.com/security/cve/CVE-2026-13218enisa_euvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2492654enisa_euvd
- https://access.redhat.com/security/cve/CVE-2026-13218Vendor AdvisoryMitigationnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2492654Issue TrackingVendor Advisorynvd
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