---
id: "CVE-2026-122308"
kind: "vulnerability"
aliases: ["CVE-2026-122308"]
title: "Kyverno: label spoofing lets users clone Secrets from restricted namespaces"
severity: "high"
cvss: 8.5
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "kubernetes", "kyverno", "multi-tenant-clusters"]
not_affected_if: ["kyverno-1.19.2-or-later", "no-synchronized-generate-policies"]
published_at: "2026-11-05T03:17:23+00:00"
first_seen_at: "2026-11-05T03:31:41+00:00"
updated_at: "2026-11-05T03:33:16+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-122308", "first_seen_at": "2026-11-05T03:31:41+00:00"}]
exploit_sources: []
---

# Kyverno: label spoofing lets users clone Secrets from restricted namespaces

Kyverno before 1.19.2 trusts internal generate.kyverno.io labels on ConfigMaps, so a user with create or update rights can forge them. The forged labels make a synchronized generate policy copy sensitive Secrets from restricted namespaces into the attacker's own namespace.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Kyverno version, for example with `kubectl get deploy kyverno-admission-controller -n kyverno -o jsonpath='{.spec.template.spec.containers[0].image}'`
- Confirm whether any generate policies use `synchronize: true` (`kubectl get clusterpolicy -o yaml`)
- Review who holds create or update permission on ConfigMaps across namespaces

## Fix

- Kyverno: move to `1.19.2` or later

## Timeline

- 2026-11-05T03:31:41+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-122308

## Documents

- [advisory] Vendor advisory: github.com https://github.com/kyverno/kyverno/security/advisories/GHSA-hg5v-hwm3-956r
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/kyverno-before-1.19.2-label-spoofing-via-generation-handler-processrequest

## From the sources

Kyverno before 1.19.2 contains an authorization bypass vulnerability in the Generation Handler that allows users with create/update permissions to trigger synchronized generate policies by spoofing internal generate.kyverno.io labels. Attackers can label a ConfigMap as managed-by kyverno with crafted policy, rule, and trigger labels to clone sensitive Secrets from restricted namespaces into their own namespace.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_