GHSA-264J-8377-4HMM
Vulnerability from github – Published: 2026-08-20 21:31 – Updated: 2026-09-03 15:32A 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.
{
"affected": [],
"aliases": [
"CVE-2026-66788"
],
"database_specific": {
"cwe_ids": [
"CWE-1104",
"CWE-284"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-20T19:16:58Z",
"severity": "CRITICAL"
},
"details": "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.",
"id": "GHSA-264j-8377-4hmm",
"modified": "2026-09-03T15:32:02Z",
"published": "2026-08-20T21:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66788"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:63016"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-66788"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507533"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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