CVE-2026-19706

8.3 HIGH No fix listed Auth & access

What it is

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.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of data exposure, data tampering, service disruption.
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2026-08-13 09:18 UTC ReservedThe CVE id was reserved by its CNA
2026-11-09 18:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-11-09 18:17 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: not scored yet.
Severity: 8.3 HIGH (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2026-11-09 18:17 UTC
Last modified: 2026-11-09 18:17 UTC
Weakness: CWE-306 · Missing authentication
Record status: Awaiting Analysis

Attack profile CVSS 3.1 · 8.3

Attack vector: Adjacent network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-19706.md and follow it. Check whether this project is affected by CVE-2026-19706. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record