---
id: CVE-2026-100707
title: >-
  Kyverno before 1.19.1 contains a namespace isolation bypass in the apiCall
  context entry of namespaced Policy resources due to inconsistent path
  interpretation between validation and execution
summary: >-
  Kyverno before 1.19.1 contains a namespace isolation bypass in the apiCall
  context entry of namespaced Policy resources due to inconsistent path
  interpretation between validation and execution. A low-privilege tenant can
  use percent-enco…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-22
vendor: kyverno
product: kyverno
affected:
  - kyverno < 1.19.1
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T14:16:55.983'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100707'
references:
  - url: 'https://github.com/kyverno/kyverno/security/advisories/GHSA-c5qq-7g2q-cpqp'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/kyverno-before-1.19.1-namespace-isolation-bypass-via-percent-encoded-path
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T13:33:20.897Z'
---

## Overview

Kyverno before 1.19.1 contains a namespace isolation bypass in the apiCall context entry of namespaced Policy resources due to inconsistent path interpretation between validation and execution. A low-privilege tenant can use percent-encoded dot-segments in urlPath to bypass namespace checks and read resources from other namespaces using the Kyverno admission controller's ServiceAccount credentials.

## Remediation

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