CVE-2026-122309
Kyverno before 1.19.2 Denial of Service via Unbounded CEL Policy Evaluation Cost
CVSS Score
6.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | kyverno |
| Product | kyverno |
| Published | Nov 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
kyverno / kyverno
0 < 1.19.2
References
Credits
1diot9