{"id":"CVE-2026-19706","aliases":["EUVD-2026-120121","GHSA-9686-4jg7-g9h3"],"status":"published","title":"Openshift/installer: openshift installer: unconditional csr approval during agent-based installation (abi) bootstrap","description":"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.","severity":{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0013,"percentile":0.02673,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-306"],"published":"2026-11-09T17:20:11Z","modified":"2026-11-09T18:32:08Z","products":[{"vendor":"red hat","product":"assisted installer for red hat openshift container platform 2"},{"vendor":"red hat","product":"multicluster engine for kubernetes"},{"vendor":"red hat","product":"red hat openshift container platform 4"},{"vendor":"red hat","product":"red hat openshift container platform 5"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-19706","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515215","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/installing_an_on-premise_cluster_with_the_agent-based_installer/index"},{"url":"https://kubernetes.io/docs/reference/access-authn-authz/certificate-signing-requests/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19706"},{"url":"https://kubernetes.io/docs/reference/access-authn-authz/certificate-signing-requests"},{"url":"https://github.com/advisories/GHSA-9686-4jg7-g9h3"}],"sources":{"cve":[{"id":"CVE-2026-19706","title":"Openshift/installer: openshift installer: unconditional csr approval during agent-based installation (abi) bootstrap","description":"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.","status":"published","published":"2026-11-09T17:20:11.31Z","modified":"2026-11-12T17:53:53.516Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-09T19:34:29.555364Z"}],"euvd":[{"id":"EUVD-2026-120121","description":"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.","status":"published","published":"2026-11-09T17:20:11Z","modified":"2026-11-12T17:53:53Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-09T20:18:01.237688Z"}],"ghsa":[{"id":"GHSA-9686-4jg7-g9h3","title":"During ABI bootstrap, the bootstrap node's approve-csr.service approves and signs every CSR...","description":"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.","status":"published","published":"2026-11-09T18:32:01Z","modified":"2026-11-09T18:32:08Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-306"],"updated_at":"2026-11-09T18:49:20.8938Z"}],"nvd":[{"id":"CVE-2026-19706","description":"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.","status":"published","published":"2026-11-09T18:17:27.583Z","modified":"2026-11-12T18:17:46.34Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-10T02:16:33.542716Z"}]}}