{"id":"CVE-2026-19706","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-19706","summary":"During ABI bootstrap, the bootstrap node's approve-csr.service approves and signs every CSR without identity validation.\n\nAn attacker on the install network can retrieve the unauthenticated…","details":"During ABI bootstrap, the bootstrap node's approve-csr.service approves and signs every CSR without identity validation.\n\nAn attacker on the install network can retrieve the unauthenticated Ignition file (ports 22623/22624), extract a limited kubeconfig, submit a CSR for CN=system:admin, receive the signed certificate, and gain full cluster-admin access.\n\nExploitable only during the narrow bootstrap window.","published":"2026-11-09T18:17:27.583","modified":"2026-11-09T23:17:22.743","cvss":{"score":8.3,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-19706"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515215"},{"type":"WEB","url":"https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/installing_an_on-premise_cluster_with_the_agent-based_installer/index"},{"type":"WEB","url":"https://kubernetes.io/docs/reference/access-authn-authz/certificate-signing-requests/"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-09T23:17:22.743"}}