CVE-2026-19706 (GCVE-0-2026-19706)
Vulnerability from cvelistv5 – Published: 2026-11-09 17:20 – Updated: 2026-11-09 22:47
VLAI
EPSS
VEX
Title
Openshift/installer: openshift installer: unconditional csr approval during agent-based installation (abi) bootstrap
Summary
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.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 22:44 UTC
CWE
- CWE-306 - Missing Authentication for Critical Functionality
Assigner
redhat
CNA
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-19706 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2515215 | issue-trackingx_refsource_REDHAT |
| https://docs.redhat.com/en/documentation/openshif… | |
| https://kubernetes.io/docs/reference/access-authn… |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Assisted Installer for Red Hat OpenShift Container Platform 2 |
cpe:/a:redhat:assisted_installer:2
|
|
| Red Hat | Multicluster Engine for Kubernetes |
cpe:/a:redhat:multicluster_engine
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat OpenShift Container Platform 5 |
cpe:/a:redhat:openshift:5
|
Date Public
2026-11-09 15:00
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