CVE-2025-64432KubeVirt is a virtual machine management add-on for Kubernetes.
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No exploitation reported and no EPSS estimate yet.
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KubeVirt is a virtual machine management add-on for Kubernetes. Versions 1.5.3 and below, and 1.6.0 contained a flawed implementation of the Kubernetes aggregation layer's authentication flow which could enable bypass of RBAC controls. It was discovered that the virt-api component fails to correctly authenticate the client when receiving API requests over mTLS. In particular, it fails to validate the CN (Common Name) field in the received client TLS certificates against the set of allowed values defined in the extension-apiserver-authentication configmap. Failre to validate certain fields in the client TLS certificate may allow an attacker to bypass existing RBAC controls by directly communicating with the aggregated API server, impersonating the Kubernetes API server and its aggregator component. This issue is fixed in versions 1.5.3 and 1.6.1.
- CVSS
- 4.7 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-287, CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
kubevirt kubevirt kubevirt:kubevirt | before 1.5.3; 1.6.0; 1.6.0; 1.6.0 | NVD |
References
- https://github.com/kubevirt/kubevirt/commit/231dc69723f331dc02f65a31ab4c3d6869f40d6apatch
- https://github.com/kubevirt/kubevirt/commit/af2f08a9a186eccc650f87c30ab3e07b669e8b5bpatch
- https://github.com/kubevirt/kubevirt/commit/b9773bc588e6e18ece896a2dad5336ef7a653074patch
- https://github.com/kubevirt/kubevirt/security/advisories/GHSA-38jw-g2qx-4286exploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.