---
id: CVE-2026-122312
title: >-
  Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath
  Query String
summary: >-
  Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in
  APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?'
  as a path character, letting the namespace regex match segments inside the
  query st…
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'
cvssSource: cna
cwe:
  - CWE-269
vendor: kyverno
product: kyverno
affected:
  - kyverno >= 1.19.1 < 1.19.2
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T02:25:14.338Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-122312'
references:
  - url: 'https://github.com/kyverno/kyverno/security/advisories/GHSA-pcx2-xcq4-65vf'
    label: GitHub Security Advisory (GHSA-pcx2-xcq4-65vf)
  - url: >-
      https://github.com/kyverno/kyverno/commit/f67231def576eb0ad153dd8cbfc836908ab14c14
    label: Patch Commit
  - url: >-
      https://www.vulncheck.com/advisories/kyverno-1.19.1-before-1.19.2-namespace-isolation-bypass-via-apicall-urlpath-query-string
    label: >-
      VulnCheck Advisory: Kyverno 1.19.1 before 1.19.2 Namespace Isolation
      Bypass via APICall URLPath Query String
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.687Z'
epss: 0.00311
epssPercentile: 0.24099
---

## Overview

Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?' as a path character, letting the namespace regex match segments inside the query string. Users who can create namespaced policies can supply a URLPath like /api/v1/nodes?x=/namespaces/default/ that passes validation while client-go requests the cluster-scoped endpoint, reading resources outside their namespace.

## Affected

- `kyverno >= 1.19.1 < 1.19.2`

## Remediation

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