---
id: CVE-2026-122313
title: >-
  Kyverno 1.17.0 before 1.19.2 Cross-Namespace Privilege Escalation via
  NamespacedMutatingPolicy
summary: >-
  Kyverno from 1.17.0 before 1.19.2 contains a privilege escalation
  vulnerability that allows namespace-scoped tenants to modify resources in
  other namespaces through NamespacedMutatingPolicy
  targetMatchConstraints.expression CEL output la…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-269
vendor: kyverno
product: kyverno
affected:
  - kyverno >= 1.17.0 < 1.19.2
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T02:25:15.036Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-122313'
references:
  - url: 'https://github.com/kyverno/kyverno/security/advisories/GHSA-f96w-622v-rqpq'
    label: GitHub Security Advisory (GHSA-f96w-622v-rqpq)
  - url: >-
      https://www.vulncheck.com/advisories/kyverno-1.17.0-before-1.19.2-cross-namespace-privilege-escalation-via-namespacedmutatingpolicy
    label: >-
      VulnCheck Advisory: Kyverno 1.17.0 before 1.19.2 Cross-Namespace Privilege
      Escalation via NamespacedMutatingPolicy
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.687Z'
epss: 0.00311
epssPercentile: 0.24101
---

## Overview

Kyverno from 1.17.0 before 1.19.2 contains a privilege escalation vulnerability that allows namespace-scoped tenants to modify resources in other namespaces through NamespacedMutatingPolicy targetMatchConstraints.expression CEL output lacking namespace checks. Attackers can emit a literal target such as another tenant's RoleBinding, which the cluster-wide background controller then mutates to add attacker subjects or alter Roles, NetworkPolicies, and ConfigMaps.

## Affected

- `kyverno >= 1.17.0 < 1.19.2`

## Remediation

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