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CVE-2026-13218: Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from virt-launcher

mediumCVSS 4.2CVE-2026-13218

CSIRTS triage

vendor: Kubevirtproduct: kubevirtOther
What
Symlink following in writetocachedfile allows host file overwrite from virt-launcher.
Who is affected
Users of Kubevirt virtualization solutions.
Urgency
Medium urgency due to a CVSS score of 4.2, indicating moderate risk.
Action
Update Kubevirt to the latest version to address this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 4.2
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-13218

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-13218coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Kubevirt

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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