How severe is CVE-2026-13218?

CVE-2026-13218 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2026-13218 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-13218?

CVE-2026-13218 primarily affects Redhat Openshift Virtualization. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-13218?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-13218 have an EU (EUVD) identifier?

Yes. CVE-2026-13218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39594.

When was CVE-2026-13218 published?

CVE-2026-13218 was published on 2026-06-26 and last updated on 2026-07-06.

CVE-2026-13218

CVE-2026-13218 is a medium-severity vulnerability in Redhat Openshift Virtualization with a CVSS 3.x base score of 4.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-61.

Key facts

Severity: Medium (CVSS 3.x base score 4.2)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39594
Weakness: CWE-61
Affected product: Redhat Openshift Virtualization
Published: 2026-06-26
Last modified: 2026-07-06

Description

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-13218?: CVE-2026-13218 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2026-13218 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-13218?: CVE-2026-13218 primarily affects Redhat Openshift Virtualization. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-13218?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-13218 have an EU (EUVD) identifier?: Yes. CVE-2026-13218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39594.
When was CVE-2026-13218 published?: CVE-2026-13218 was published on 2026-06-26 and last updated on 2026-07-06.

References

Affected products (2)

cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*
cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*

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