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Vendor Workaround
To mitigate this issue, restrict network access to the user-facing Route of the `cluster-proxy-addon` to trusted networks only. Implement firewall rules to limit inbound connections to the Route's exposed port, ensuring only authorized sources can reach it. This reduces the attack surface by preventing unauthenticated external access to the vulnerable proxy.
Tracking
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Wed, 19 Aug 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in the `cluster-proxy-addon` component of Multicluster Engine for Kubernetes. This vulnerability allows an unauthenticated attacker, who can access the user-facing route, to bypass authentication and authorization checks. By manipulating URL path segments, the attacker can proxy requests to arbitrary services across any managed cluster. This enables unauthorized access to internal services that would otherwise be protected, potentially leading to information disclosure or further compromise of the cluster environment. | |
| Title | Cluster-proxy-addon: cluster-proxy-addon: unauthenticated ssrf to arbitrary managed-cluster services via public route | |
| First Time appeared |
Redhat
Redhat multicluster Engine |
|
| Weaknesses | CWE-918 | |
| CPEs | cpe:/a:redhat:multicluster_engine | |
| Vendors & Products |
Redhat
Redhat multicluster Engine |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-08-19T17:30:07.984Z
Reserved: 2026-07-27T17:51:24.886Z
Link: CVE-2026-66794
No data.
Status : Received
Published: 2026-08-19T18:17:16.547
Modified: 2026-08-19T18:17:16.547
Link: CVE-2026-66794
No data.
OpenCVE Enrichment
No data.
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CWE-918
Server-Side Request Forgery (SSRF)