CVE-2026-66793
High
Description
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductAcm 2.11
PublishedAug 18, 2026
First seenAug 18, 2026
Weakness typeCWE-20Improper input validation
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| acm 2.11 | No range specified | — |
| acm 2.13 | No range specified | — |
| acm 2.14 | No range specified | — |
| acm 2.15 | No range specified | — |
| acm 2.16 | No range specified | — |
| acm 2.17 | No range specified | — |
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