CVE-2026-73268: Improper Control of Generation of Code ('Code Injection') in Red Hat multicluster engine for Kubernetes 2.10
Description
CVE-2026-73268 is a critical code injection vulnerability in the cluster-curator-controller component of Red Hat multicluster engine for Kubernetes 2.10. A tenant with create or update permissions on ClusterCurator resources can inject arbitrary Job specifications due to insufficient validation in the CreateJob() function. Exploitation allows running injected Jobs with elevated controller privileges, leading to arbitrary code execution and privilege escalation with potential access to cluster-wide secrets.
CVSS v3.1
Score 9.9critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists because the CreateJob() function in the cluster-curator-controller component does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. This flaw enables a tenant with create or update permissions on ClusterCurator resources to inject arbitrary Job specifications. Successful exploitation results in the injected Job running with the controller's elevated privileges, allowing arbitrary code execution and privilege escalation, potentially exposing sensitive cluster-wide secrets.
Potential Impact
An attacker with limited permissions (create or update on ClusterCurator resources) can escalate privileges by injecting arbitrary Jobs that run with elevated controller privileges. This can lead to arbitrary code execution within the cluster and unauthorized access to sensitive cluster-wide secrets, posing a critical security risk.
Mitigation Recommendations
Red Hat has released security updates in multicluster engine for Kubernetes version 2.11.6 and later that address this vulnerability. Users should upgrade to version 2.11.6 or later to remediate this issue. Refer to the official Red Hat advisory RHSA-2026:59556 for detailed upgrade instructions. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-6c6p-j4gf-mj2c
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-73268"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
- State
- PUBLISHED
Patch Information
Threat ID: 6a9d763bacd9273b49d80b6d
Added to database: 09/06/2026, 14:18:35 UTC
Last enriched: 09/29/2026, 21:29:52 UTC
Last updated: 10/21/2026, 13:20:24 UTC
Views: 140
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