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---
name: cis-k8s-v1110-5.1.12
description: "Minimize access to webhook configuration objects (Manual)"
category: cis-k8s
version: "1.11.0"
author: cyberstrike-official
tags: [cis, kubernetes, policies, rbac, service-accounts, webhook-config]
cis_id: "5.1.12"
cis_benchmark: "CIS Kubernetes Benchmark v1.11.0"
tech_stack: [kubernetes]
cwe_ids: []
chains_with: []
prerequisites: []
severity_boost: {}
---
# 5.1.12 Minimize access to webhook configuration objects (Manual)
## Profile Applicability
- Level 1 - Master Node
## Description
Users with rights to create/modify/delete `validatingwebhookconfigurations` or `mutatingwebhookconfigurations` can control webhooks that can read any object admitted to the cluster, and in the case of mutating webhooks, also mutate admitted objects. This could allow for privilege escalation or disruption of the operation of the cluster.
## Rationale
The ability to manage webhook configuration should be limited.
## Audit
Review the users who have access to `validatingwebhookconfigurations` or `mutatingwebhookconfigurations` objects in the Kubernetes API.
## Remediation
Where possible, remove access to the `validatingwebhookconfigurations` or `mutatingwebhookconfigurations` objects.
## References
1. https://kubernetes.io/docs/concepts/security/rbac-good-practices/#control-admission-webhooks
