{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.19.1"
                  },
                  {
                    "fixed": "1.19.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "introduced": "1.19.1"
                  },
                  {
                    "fixed": "1.19.2"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          },
          "events": [
            {
              "introduced": "40ec788d48bb28d83dbf85538e962a59db9d45c6"
            },
            {
              "fixed": "e63308f1e16c05cd009ac4864be6ec25c66b49be"
            }
          ],
          "repo": "https://github.com/kyverno/kyverno",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-39w8-hv5g-f73w"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-441"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124440.json"
  },
  "details": "Kyverno from 1.19.1 before 1.19.2 contains an authorization bypass vulnerability in the apiCall namespace clamp that allows namespace tenants to issue cross-namespace and cluster-scoped API requests by appending malformed percent-escapes to urlPath. Attackers can create namespaced Policies whose apiCall runs as the admission-controller ServiceAccount to read other namespaces' resources and create mutating webhooks, escalating to cluster admin.",
  "id": "CVE-2026-124440",
  "modified": "2026-11-10T02:30:48.699911962Z",
  "published": "2026-11-08T13:15:33.723Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124440.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-39w8-hv5g-f73w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124440"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/kyverno-1.19.1-privilege-escalation-via-apicall-namespace-clamp-bypass"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kyverno 1.19.1 Privilege Escalation via apiCall Namespace Clamp Bypass"
}