{"id":"CVE-2026-4342","aliases":["GHSA-f53h-mxv9-cp98","GO-2026-4796"],"url":"https://o3.security/vulnerability/CVE-2026-4342","summary":"ingress-nginx comment-based nginx configuration injection","details":"A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)","published":"2026-03-19T21:50:17.878Z","modified":"2026-08-07T11:51:11.262720481Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"k8s.io/ingress-nginx","fixedVersion":"0.0.0-20260319175635-5183b7d86137"}],"fix":null,"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/03/19/9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4342.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4342"},{"type":"REPORT","url":"https://github.com/kubernetes/kubernetes/issues/137893"},{"type":"PACKAGE","url":"https://github.com/kubernetes/ingress-nginx"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:11.262720481Z"}}