CVE-2026-122309: Kyverno before 1.19.2 Denial of Service via Unbounded CEL Policy Evaluation Cost
Published Nov 5, 2026
·Updated
Kyverno before 1.19.2 contains a denial of service vulnerability that allows namespace-scoped policy authors to exhaust CPU and memory by submitting CEL expressions evaluated without runtime cost limits. Attackers can create a NamespacedValidatingPolicy or NamespacedDeletingPolicy with nested map comprehensions over large ConfigMap fields to OOM-kill Kyverno pods and block cluster-wide admission.
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Kyvernoto a version that resolves this vulnerability.Fixed in 1.19.2
Event History
Nov 5, 2026
CVE Published
via MITRE·02:25 AM
Data Sourced
via MITRE·02:25 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·03:17 AM
DescriptionSeverityWeakness