CVE-2026-66788
Lighthouse: lighthouse: arbitrary local-namespace injection via attacker-controlled labelsourcenamespace
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized EndpointSlices and ServiceImports into any namespace on peer clusters, including critical system namespaces like kube-system and openshift-*. This could lead to privilege escalation or other forms of system compromise within the cluster.
| CWE | CWE-284 |
| Vendor | red hat |
| Product | red hat advanced cluster management for kubernetes 2 |
| Published | Aug 20, 2026 |
| Last Updated | Aug 20, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2
All versions affected Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2
All versions affected Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2
All versions affected Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2
All versions affected