GHSA-9686-4jg7-g9h3HighCVSS 8.3
During ABI bootstrap, the bootstrap node's approve-csr.service approves and signs every CSR...
🔗 CVE IDs covered (1)
📋 Description
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 (6)
- https://nvd.nist.gov/vuln/detail/CVE-2026-19706
- 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_an_on-premise_cluster_with_the_agent-based_installer/index
- https://kubernetes.io/docs/reference/access-authn-authz/certificate-signing-requests
- https://github.com/advisories/GHSA-9686-4jg7-g9h3