{"id":"CVE-2026-16543","summary":"Kong Operator cluster-wide ingress configuration DoS via embedded KIC CA-certificate ID collision","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.","aliases":["GHSA-h4fh-j7xg-vwcx"],"modified":"2026-08-12T03:51:32.549303173Z","published":"2026-07-29T15:29:03.485Z","database_specific":{"cwe_ids":["CWE-400","CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16543.json","cna_assigner":"Kong"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kong/kong-operator","events":[{"introduced":"c35ea3121973cb1346b15ddd11178262a7b81e24"},{"fixed":"c82c010a8b0ecd9153defc970ae2496295fa4efc"},{"introduced":"11e82af4d5467ac1316b70f4ba58989ac7061bbf"},{"fixed":"7c8eb4da2b861184d991afd810d02fdb44958551"},{"introduced":"0"},{"fixed":"08a60fecd564fdc9cba3e445768139708d103ec9"}],"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"}}],"versions":["v2.0.10","v2.2.2","v2.2.1","v2.1.8","v2.1.7","v2.2.0","v2.0.9","v2.1.6","v2.1.5","v2.1.4","v2.0.8","v2.1.3","v2.0.7","v2.1.2","v2.1.1","v2.1.0","v2.0.6","v2.0.5","v2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v2.0.0-alpha.5","v2.0.0-alpha.4","v2.0.0-alpha.3","v2.0.0-alpha.2","v2.0.0-alpha.1","v1.6.0","v1.5.0","v1.4.0","v1.4.0-rc.1","v1.4.0-rc.0","v1.3.0","v1.3.0-rc.2","v1.3.0-rc.1","v1.2.1","v1.2.0","v1.2.0-rc.3","v1.2.0-rc.2","v1.2.0-rc.1","v1.2.0-alpha.2","v1.2.0-alpha.1","v1.1.0","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v1.0.0-rc.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.1","v0.1.0","v0.0.5","v0.0.4","v0.0.3","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-16543.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}