CVE catalog
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 u
- Severity
- Medium · CVSS 4.2
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.14% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | kubevirt | Not reported | Not reported | unknown |
| Cpe | openshift_virtualization | Not reported | Not reported | unknown |
| Cpe | kubevirt | Not reported | Not reported | unknown |
| Cpe | openshift_virtualization | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://access.redhat.com/security/cve/CVE-2026-13218]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2492654]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-13218]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13218.json]
[FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]