CVE-2026-66792 Privilege escalation in Multicluster Global Hub 1.4.9
A user on a managed cluster can escalate privileges by crafting Subscription annotations, allowing resource deployment with controller permissions.
- 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-2026-66792?
CVE-2026-66792 is a critical vulnerability in Red Hat Multicluster Global Hub 1.4.9, published on 17 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 user on a managed cluster to escalate their privileges by creating a Subscription with specific, crafted annotations. Successful exploitation grants the attacker the ability to deploy resources into any namespace with the elevated permissions of the controller's Service Account, potentially leading to unauthorized access and control over cluster resources.
Weakness: CWE-863
Which versions are affected by CVE-2026-66792?
How do I fix CVE-2026-66792?
No fix has been published for CVE-2026-66792 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-66792 being exploited?
There is no known exploitation of CVE-2026-66792 in the wild and no public exploit code.
Sources
Also known as GHSA-8jj2-p7p7-6mr3.