HIGHCVSS v3.1 8.3Vulnerability
CVE-2026-19706
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.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-11-10T23:33:48.924589+00:00
- Epss score
- 0.0013
- Cvss severity
- HIGH
- Cvss score
- 8.3
- Retrieved at
- 2026-11-10T23:35:18+00:00
- Last source
- FIRST EPSS
- Score
- 8.3
- Cvss version
- 3.1
- Cve id
- CVE-2026-19706
- Cvss vector
- CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- First seen by Signal
- 2026-11-09T19:15:57+00:00
- Name
- CVE-2026-19706
- Vector
- CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published at
- 2026-11-09T18:17:27.583
- Last modified
- 2026-11-09T23:17:22.743
- Epss percentile
- 0.02655
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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