GHSA-J6CV-3W8P-VRG8

Vulnerability from github – Published: 2026-04-15 21:30 – Updated: 2026-04-16 21:40
VLAI?
Summary
KubeVirt's authorization mechanism improperly truncates subresource names
Details

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.

Severity ?
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "kubevirt.io/kubevirt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-6383"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T21:40:08Z",
    "nvd_published_at": "2026-04-15T19:16:38Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in KubeVirt\u0027s 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.",
  "id": "GHSA-j6cv-3w8p-vrg8",
  "modified": "2026-04-16T21:40:08Z",
  "published": "2026-04-15T21:30:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6383"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubevirt/kubevirt/issues/17337"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-6383"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458741"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kubevirt/kubevirt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "KubeVirt\u0027s authorization mechanism improperly truncates subresource names"
}


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