CVE-2026-66793

HIGH 8.8

Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation.

CWE	CWE-20
Vendor	red hat
Product	red hat advanced cluster management for kubernetes 2.11
Published	Aug 18, 2026
Last Updated	Sep 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.11

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.13

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.14

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.15

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.16

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.17

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗