high · CVSS v3 7.7 · CVSS v4 8.3

CVE-2026-122306

Kyverno before 1.19.2 contains a denial of service vulnerability that allows namespaced policy authors to exhaust admiss…

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.

Scores

Severity
high
CVSS v2
6.8
CVSS v3
7.7
CVSS v4
8.3
EPSS
—

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