CVE-2026-73268 Cluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows arbitrary job spec injection
Attackers with ClusterCurator permissions can inject arbitrary Job specs to execute code and escalate privileges within the Kubernetes cluster.
- 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-2026-73268?
CVE-2026-73268 is a critical code injection vulnerability in Red Hat multicluster engine for Kubernetes 2.10, 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 cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets.
Weakness: CWE-94
Which versions are affected by CVE-2026-73268?
How do I fix CVE-2026-73268?
No fix has been published for CVE-2026-73268 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-73268 being exploited?
There is no known exploitation of CVE-2026-73268 in the wild and no public exploit code.
Sources
Also known as GHSA-6c6p-j4gf-mj2c.