CVE-2026-67567 Privilege escalation in Red Hat Advanced Cluster Management for Kubernetes 2.11
A tenant can escalate privileges and deploy arbitrary cluster resources by exploiting missing validation in the HelmRelease controller's ServiceAccount usage.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67567?
CVE-2026-67567 is a critical vulnerability in Red Hat Advanced Cluster Management for Kubernetes 2.11, published on 20 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a tenant, who has the ability to create HelmRelease custom resources (CRs), to bypass existing security controls. The system's HelmRelease controller processes Helm chart templates using its own elevated ServiceAccount privileges without proper validation. This enables the tenant to deploy arbitrary resources across the entire cluster, leading to a significant security compromise.
Weakness: CWE-441
Which versions are affected by CVE-2026-67567?
How do I fix CVE-2026-67567?
No fix has been published for CVE-2026-67567 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-67567 being exploited?
There is no known exploitation of CVE-2026-67567 in the wild and no public exploit code.
Sources
Also known as GHSA-gf3r-gm67-jgrv.