Privilege Escalation Vulnerability in Multicluster Engine for Kubernetes by Red Hat
CVE-2026-10059

9.1CRITICAL

Key Information:

Vendor

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

What is CVE-2026-10059?

A security flaw was detected in the Multicluster Engine for Kubernetes related to its ClusterCurator controller. A tenant administrator with namespace-scoped privileges may create a namespaced ClusterCurator, unintentionally enabling them to generate a token for a ServiceAccount with extensive cluster-wide administrative powers. This vulnerability facilitates unauthorized privilege escalation, potentially leading to complete control over the Kubernetes cluster.

References

https://access.redhat.com/security/cve/CVE-2026-10059
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2483187
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Christopher Lusk (North Echo Security Research) for reporting this issue.
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