Auth bypass in Kubevirt

CVE-2025-64434

KubeVirt is a virtual machine management add-on for Kubernetes. Prior to 1.5.3 and 1.6.1, due to the peer verification logic in virt-handler (via verifyPeerCert), an attacker who compromises a virt-handler instance, could exploit these sha…

Vulnerability class: Broken Authentication

EPSS: 0.002 (8.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

  • Kubevirt — versions >= 1.6.0-alpha.0, < 1.6.1, < 1.5.3, 1.6.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-64434?
CVE-2025-64434 is a medium-severity vulnerability in Kubevirt, classified under Improper Authentication. CVSS score: 4.7/10. Published 2025-11-07.
How severe is CVE-2025-64434?
Medium severity. CVSS v3 base score is 4.7 out of 10.