CVE-2026-72526 Missing authorization in Red Hat Advanced Cluster Management for Kubernetes 2.11
A hub tenant can target arbitrary spoke clusters via unvalidated annotations, forcing ArgoCD to execute attacker-controlled manifests and escalate privileges.
- 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-2026-72526?
CVE-2026-72526 is a critical missing authorization vulnerability in Red Hat Advanced Cluster Management for Kubernetes 2.11, published on 12 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-integrations component. The Application propagation controller processes the `ocm-managed-cluster` annotation from an Application Custom Resource (CR) without proper validation. A tenant with permissions to create Applications on the hub cluster can exploit this to target arbitrary managed clusters. This can force ArgoCD on the spoke clusters to synchronize attacker-controlled manifests, leading to arbitrary code execution or privilege escalation on those clusters.
Weakness: CWE-441
Which versions are affected by CVE-2026-72526?
How do I fix CVE-2026-72526?
No fix has been published for CVE-2026-72526 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-72526 being exploited?
There is no known exploitation of CVE-2026-72526 in the wild and no public exploit code.
Sources
Also known as GHSA-hp26-rmxw-4cpv.