CVE-2026-13218 (GCVE-0-2026-13218)
Vulnerability from cvelistv5 – Published: 2026-06-25 23:23 – Updated: 2026-06-26 14:58
VLAI
EPSS
VEX
Title
Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from virt-launcher
Summary
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.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 14:58 UTC
CWE
- CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-13218 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2492654 | issue-trackingx_refsource_REDHAT |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Red Hat | Red Hat OpenShift Virtualization 4 |
cpe:/a:redhat:container_native_virtualization:4
|
Date Public
2026-06-25 00:00
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