---
id: CVE-2026-122306
title: Kyverno before 1.19.2 Denial of Service via Exponential-Time Wildcard Matching
summary: >-
  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…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-407
vendor: kyverno
product: kyverno
affected:
  - kyverno < 1.19.2
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T02:25:10.219Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-122306'
references:
  - url: 'https://github.com/kyverno/kyverno/security/advisories/GHSA-8mrj-27wr-599g'
    label: GitHub Security Advisory (GHSA-8mrj-27wr-599g)
  - url: >-
      https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-exponential-time-wildcard-matching
    label: >-
      VulnCheck Advisory: Kyverno before 1.19.2 Denial of Service via
      Exponential-Time Wildcard Matching
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.687Z'
epss: 0.00301
epssPercentile: 0.22943
---

## Overview

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.

## Affected

- `kyverno < 1.19.2`

## Remediation

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