---
id: CVE-2026-122309
title: >-
  Kyverno before 1.19.2 Denial of Service via Unbounded CEL Policy Evaluation
  Cost
summary: >-
  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
  Namespaced…
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-400
vendor: kyverno
product: kyverno
affected:
  - kyverno < 1.19.2
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T02:25:12.280Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-122309'
references:
  - url: 'https://github.com/kyverno/kyverno/security/advisories/GHSA-m8p2-qqmx-j53x'
    label: GitHub Security Advisory (GHSA-m8p2-qqmx-j53x)
  - url: >-
      https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-unbounded-cel-policy-evaluation-cost
    label: >-
      VulnCheck Advisory: Kyverno before 1.19.2 Denial of Service via Unbounded
      CEL Policy Evaluation Cost
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.686Z'
epss: 0.00197
epssPercentile: 0.09483
---

## Overview

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.

## Affected

- `kyverno < 1.19.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.