Vulnerability in Cluster Curator Component of Multicluster Engine by Red Hat
CVE-2026-73268

9.9CRITICAL

Key Information:

Vendor

Red Hat
Status
Multicluster Engine For Kubernetes
Vendor
CVE Published:
12 August 2026

What is CVE-2026-73268?

A flaw exists in the cluster-curator-controller component of the Multicluster Engine, where a tenant possessing create or update permissions on ClusterCurator resources can inject arbitrary Job specifications. This vulnerability arises from the CreateJob() function's failure to properly validate user-controlled input during the unmarshaling process of the spec.install.overrideJob raw extension. Successful exploitation of this flaw allows unauthorized Job execution with elevated privileges granted to the controller, posing a serious risk as it may lead to arbitrary code execution and potential access to sensitive cluster-wide secrets.

References

https://access.redhat.com/security/cve/CVE-2026-73268
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2514219
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.