CVE-2026-13218A flaw was found in KubeVirt's virt-handler network cache handling.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 4.2 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L
- Weakness (CWE)
- CWE-61
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
kubevirt kubevirt kubevirt:kubevirt | all versions | NVD |
redhat openshift_virtualization redhat:openshift_virtualization | from 4 through 4.22.0 | NVD |
References
- https://access.redhat.com/security/cve/CVE-2026-13218vendor-advisory, mitigation
- https://bugzilla.redhat.com/show_bug.cgi?id=2492654issue-tracking, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.