CVE-2026-66788
Lighthouse: lighthouse: arbitrary local-namespace injection via attacker-controlled labelsourcenamespace
Description
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.
INFO
Published Date :
Aug. 20, 2026, 6:15 p.m.
Last Modified :
Aug. 20, 2026, 6:15 p.m.
Remotely Exploit :
Yes !
Source :
redhat
Affected Products
The following products are affected by CVE-2026-66788
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 53f830b8-0a3f-465b-8143-3b8a9948e749 |
Solution
- Restrict namespace access using RBAC.
- Apply security context constraints.
- Update Lighthouse to a patched version.
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The following list is the news that have been mention
CVE-2026-66788 vulnerability anywhere in the article.