{"cve":"CVE-2025-64432","nvd":{"published":"2025-11-07T19:16:26.833","modified":"2026-06-17T09:54:22.490","status":"Analyzed","description":"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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","score":4.7},"cwes":["CWE-287","CWE-295"],"references":["https://github.com/kubevirt/kubevirt/commit/231dc69723f331dc02f65a31ab4c3d6869f40d6a","https://github.com/kubevirt/kubevirt/commit/af2f08a9a186eccc650f87c30ab3e07b669e8b5b","https://github.com/kubevirt/kubevirt/commit/b9773bc588e6e18ece896a2dad5336ef7a653074","https://github.com/kubevirt/kubevirt/security/advisories/GHSA-38jw-g2qx-4286"],"products":["kubevirt:kubevirt"],"source":"nvd","synced_at":"2026-10-19T22:14:53.307938015+00:00"},"epss":{"cve":"CVE-2025-64432","score":0.00146,"percentile":0.03831,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-38jw-g2qx-4286","url":"https://osv.dev/vulnerability/GHSA-38jw-g2qx-4286","summary":"KubeVirt Affected by an Authentication Bypass in Kubernetes Aggregation Layer ","modified":"2026-09-10T03:50:30.375731387Z","packages":[{"ecosystem":"Go","name":"kubevirt.io/kubevirt","purl":"pkg:golang/kubevirt.io/kubevirt","ranges":["<1.5.3"],"fixed":["1.5.3"]},{"ecosystem":"Go","name":"kubevirt.io/kubevirt","purl":"pkg:golang/kubevirt.io/kubevirt","ranges":[">=1.6.0-alpha.0 <1.6.1"],"fixed":["1.6.1"]},{"ecosystem":"Go","name":"kubevirt.io/kubevirt","purl":"pkg:golang/kubevirt.io/kubevirt","ranges":[">=1.7.0-alpha.0 <1.7.0-rc.0"],"fixed":["1.7.0-rc.0"]}]},{"id":"GO-2025-4103","url":"https://osv.dev/vulnerability/GO-2025-4103","summary":"KubeVirt Affected by an Authentication Bypass in Kubernetes Aggregation Layer in kubevirt.io/kubevirt","modified":"2026-03-25T20:29:15.352653Z","packages":[{"ecosystem":"Go","name":"kubevirt.io/kubevirt","purl":"pkg:golang/kubevirt.io/kubevirt","ranges":["<1.5.3",">=1.6.0-alpha.0 <1.6.0-beta.0.0.20250730135146-231dc69723f3",">=1.6.0-rc.0 <1.6.1",">=1.6.2 <1.7.0-rc.0"],"fixed":["1.5.3","1.6.0-beta.0.0.20250730135146-231dc69723f3","1.6.1","1.7.0-rc.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}