HIGH 8.3 NVD
CVE-2026-19706
During ABI bootstrap, the bootstrap node's approve-csr.service approves and signs every CSR without identity validation. An attacker on the install network can
During ABI bootstrap, the bootstrap node's approve-csr.service approves and signs every CSR without identity validation.
An 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.
Exploitable only during the narrow bootstrap window.
References
- https://access.redhat.com/security/cve/CVE-2026-19706
- https://bugzilla.redhat.com/show_bug.cgi?id=2515215
- https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/installing
- https://kubernetes.io/docs/reference/access-authn-authz/certificate-signing-requests/
This high severity vulnerability with a CVSS score of 8.3 was published on 2026-11-09 via NVD.
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