{"cve":"CVE-2026-6383","nvd":{"published":"2026-04-15T19:16:38.520","modified":"2026-10-26T22:10:00.163","status":"Awaiting Analysis","description":"A flaw was found in KubeVirt's Role-Based Access Control (RBAC) evaluation logic. The authorization mechanism improperly truncates subresource names, leading to incorrect permission evaluations. This allows authenticated users with specific custom roles to gain unauthorized access to subresources, potentially disclosing sensitive information or performing actions they are not permitted to do. Additionally, legitimate users may be denied access to resources.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-863"],"references":["https://access.redhat.com/security/cve/CVE-2026-6383","https://bugzilla.redhat.com/show_bug.cgi?id=2458741"],"products":[],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-6383","score":0.0015,"percentile":0.04125,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-j6cv-3w8p-vrg8","url":"https://osv.dev/vulnerability/GHSA-j6cv-3w8p-vrg8","summary":"KubeVirt's authorization mechanism improperly truncates subresource names","modified":"2026-09-10T03:51:02.202772827Z","packages":[{"ecosystem":"Go","name":"kubevirt.io/kubevirt","purl":"pkg:golang/kubevirt.io/kubevirt","ranges":["<=1.8.1"],"fixed":[]}]},{"id":"GO-2026-5450","url":"https://osv.dev/vulnerability/GO-2026-5450","summary":"KubeVirt's authorization mechanism improperly truncates subresource names in kubevirt.io/kubevirt","modified":"2026-06-26T15:44:23.967943132Z","packages":[{"ecosystem":"Go","name":"kubevirt.io/kubevirt","purl":"pkg:golang/kubevirt.io/kubevirt","ranges":["all versions"],"fixed":[]}]}],"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."]}