CVE-2026-19706
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. 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.
INFO
Published Date :
Nov. 9, 2026, 5:20 p.m.
Last Modified :
Nov. 9, 2026, 5:20 p.m.
Remotely Exploit :
No
Source :
redhat
Affected Products
The following products are affected by CVE-2026-19706
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Validate identity before approving Certificate Signing Requests.
- Restrict access to the bootstrap Ignition file.
- Implement network segmentation during bootstrapping.
- Apply security patches promptly.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-19706 vulnerability anywhere in the article.