Dashboard / CVE-2026-19706

CVE-2026-19706

HIGH
MEDIUM Priority: 0.01 BB Relevance: 52/100
Published: 2026-11-09 Modified: 2026-11-12 First seen: 2026-11-09 Status: active

Attack Surface

Adjacent No Auth No Interaction Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Adjacent
AC: High
PR: None
UI: None
S: Changed
C: High
I: High
A: High

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.

Weakness Classification (1)

References & Advisories (4)

https://bugzilla.redhat.com/show_bug.cgi?id=2515215
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

52 / 100
✓ No authentication
✓ No user interaction

CVSS Score

8.3 / 10.0 v3.1
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploitation Probability

0.13%
Raw Score 0.001300
Percentile 2.7%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00130
2026-11-12
0.00130
2026-11-10
0.00130

Intelligence Sources

mitre ref →
nvd ref →

External Links