CVE-2026-66788 LOW

CVE-2026-66788: Lighthouse: dockerfile build stages use end-of-life fedora 40 referenced by mutable tag

Weakness CWE-1104
Published August 20, 2026
Last update September 3, 2026

CVSS base score

3.7/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 20, 2026 CVE published
September 3, 2026 Record updated