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.
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.
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Mon, 09 Nov 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Openshift/installer: openshift installer: unconditional csr approval during agent-based installation (abi) bootstrap | |
| First Time appeared |
Redhat
Redhat assisted Installer Redhat multicluster Engine Redhat openshift |
|
| Weaknesses | CWE-306 | |
| CPEs | cpe:/a:redhat:assisted_installer:2 cpe:/a:redhat:multicluster_engine cpe:/a:redhat:openshift:4 cpe:/a:redhat:openshift:5 |
|
| Vendors & Products |
Redhat
Redhat assisted Installer Redhat multicluster Engine Redhat openshift |
|
| References |
|
|
| Metrics |
cvssV3_1
|
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-11-09T17:20:11.310Z
Reserved: 2026-08-13T09:18:22.162Z
Link: CVE-2026-19706
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Weaknesses