CVE-2026-122306

HighCVSS 7.7/10Last modified Nov 10, 2026

Description

Kyverno before 1.19.2 contains a denial of service vulnerability that allows namespaced policy authors to exhaust admission controller CPU by submitting pathological wildcard patterns. Attackers can create a Policy with crafted match and exclude names evaluated by ValidateMatchExcludeConflict, pinning cores and causing cluster-wide webhook timeouts that block resource operations.

Metrics

CVSS 3.1 7.7/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Weakness enumeration

CWE-407

Affected software

No affected versions have been published.

Timeline

Published
Nov 5, 2026
Last modified
Nov 10, 2026
NVD status
Analyzed

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CVE-2026-122306: High severity, CVSS 7.7 | Vulnix