Unknown · Kubesphere · CVE-2026-71208
**Name of the Vulnerable Software and Affected Versions**
KubeSphere (affected versions not specified)
**Description**
The cluster-controller reconciliation process in the `addCluster` function (located in `pkg/utils/clusterclient/clusterclient.go`) processes connection configurations for Cluster custom resources. It calls `Discovery().ServerVersion()` against the specified Kubernetes API endpoint after performing only basic URL syntax parsing via `url.Parse`. Because there is no allow or deny-list for loopback, RFC1918 private ranges, link-local, or cloud-metadata addresses (such as 169.254.169.254), a user with permissions to create or update a Cluster CRD can force the controller-manager and apiserver pods to send outbound requests to arbitrary internal or metadata endpoints.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.