{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.2.0"
              },
              {
                "fixed": "2.2.3"
              },
              {
                "introduced": "2.1.0"
              },
              {
                "fixed": "2.1.9"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "2.0.11"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "c35ea3121973cb1346b15ddd11178262a7b81e24"
            },
            {
              "fixed": "c82c010a8b0ecd9153defc970ae2496295fa4efc"
            },
            {
              "introduced": "11e82af4d5467ac1316b70f4ba58989ac7061bbf"
            },
            {
              "fixed": "7c8eb4da2b861184d991afd810d02fdb44958551"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "08a60fecd564fdc9cba3e445768139708d103ec9"
            }
          ],
          "repo": "https://github.com/kong/kong-operator",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-h4fh-j7xg-vwcx"
  ],
  "database_specific": {
    "cna_assigner": "Kong",
    "cwe_ids": [
      "CWE-400",
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16543.json"
  },
  "details": "Kong Operator's embedded Kong Kubernetes Ingress Controller (KIC) allows a user with namespace-scoped Secret creation privileges to cause a cluster-wide ingress configuration denial of service. The embedded KIC collects CA-certificate Secrets across all watched namespaces using a label selector alone, without ingress-class or namespace restrictions. The CA-certificate primary key is derived from a user-supplied field in the Secret. Duplicate CA-certificate IDs cause Kong Gateway to reject the entire configuration document and halting all ingress changes cluster-wide.",
  "id": "CVE-2026-16543",
  "modified": "2026-08-12T03:51:32.549303173Z",
  "published": "2026-07-29T15:29:03.485Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16543.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Kong/kong-operator/security/advisories/GHSA-h4fh-j7xg-vwcx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16543"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Kong/kong-operator"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kong Operator cluster-wide ingress configuration DoS via embedded KIC CA-certificate ID collision"
}