---
id: CVE-2026-100703
title: >-
  Kyverno 1.16.0 through 1.19.0 registers the globalcontext.Lib CEL library in
  its policy environment without confining it to the policy's namespace, unlike
  the sibling libraries (resource.Lib, http.Lib, configMap loader) which are
  handed …
summary: >-
  Kyverno 1.16.0 through 1.19.0 registers the globalcontext.Lib CEL library in
  its policy environment without confining it to the policy's namespace, unlike
  the sibling libraries (resource.Lib, http.Lib, configMap loader) which are
  handed …
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-200
vendor: kyverno
product: kyverno
affected:
  - kyverno >= 1.16.0 < 1.19.1
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T14:16:55.420'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100703'
references:
  - url: 'https://github.com/kyverno/kyverno/security/advisories/GHSA-59v6-2x73-wfg4'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/kyverno-before-1.19.1-cross-namespace-data-access-via-globalcontext-lib
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T13:33:20.899Z'
---

## Overview

Kyverno 1.16.0 through 1.19.0 registers the globalcontext.Lib CEL library in its policy environment without confining it to the policy's namespace, unlike the sibling libraries (resource.Lib, http.Lib, configMap loader) which are handed the policy namespace. A tenant who can create a namespaced policy (e.g. NamespacedValidatingPolicy, and likewise the namespaced mutating, deleting, generating, and image-validating policy kinds) in their own namespace can call globalContext.get("<entry>", "") and receive the full cached contents of a cluster-scoped GlobalContextEntry, including data cached from namespaces the tenant has no RBAC permission to read. No admission validation rejects such calls. Fixed in 1.19.1.

## Remediation

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