CVE-2026-10059 Cluster-curator-controller: cluster-curator-controller: namespace admin can escalate to cluster-wide curator authority via clustercurator serviceaccount token

A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a tok...

EUVD-2026-53293

A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a tok...

CVE-2026-10059 Cluster-curator-controller: cluster-curator-controller: namespace admin can escalate to cluster-wide curator authority via clustercurator serviceaccount token

A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a tok...

CVE-2026-10059

The CVE-2026-10059 issue affects the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can create a namespaced ClusterCurator, which inadvertently enables minting a token for a ServiceAccount with cluster-wide administrative auth...

CVE-2026-10090

A flaw was found in the Application Subscription controller multicluster-operators-subscription of Red Hat Advanced Cluster Management for Kubernetes ACM. A user with namespace-scoped "edit" privileges in an ACM hub namespace can create a Channel resource pointing to a Helm repository they contro...

CVE-2026-10059

A flaw was found in the Multicluster Engine for Kubernetes ClusterCurator controller. A tenant administrator with namespace-scoped privileges can exploit this vulnerability by creating a namespaced ClusterCurator. This action inadvertently grants the tenant administrator the ability to mint a tok...

CVE-2026-71208

KubeSphere's cluster-controller reconciliation pkg/utils/clusterclient/clusterclient.go, addCluster processes every Cluster custom resource's connection configuration and immediately calls Discovery.ServerVersion against the CRD-specified Kubernetes API endpoint, which is parsed only for URL synt...

CVE-2026-55997

Rancher issues long-lived registration tokens to authenticate nodes and agents joining a downstream cluster. These tokens were stored and exposed in plaintext with no expiration, so a malicious user could obtain one either through the Rancher API, etcd, stored automation, or direct file access on...

CVE-2026-55996

A denial-of-service vulnerability was identified in multiple TLS listeners in Rancher. Both the cattle-cluster-agent component running in downstream clusters and the Rancher server itself use the dynamiclistener library to serve TLS traffic. Without an effective CN filter configured,...

EUVD-2026-53259

Rancher issues long-lived registration tokens to authenticate nodes and agents joining a downstream cluster. These tokens were stored and exposed in plaintext with no expiration, so a malicious user could obtain one either through the Rancher API, etcd, stored automation, or direct file access on...

CVE-2026-55997 Long-lived Rancher registration token exposed in plaintext

Rancher issues long-lived registration tokens to authenticate nodes and agents joining a downstream cluster. These tokens were stored and exposed in plaintext with no expiration, so a malicious user could obtain one either through the Rancher API, etcd, stored automation, or direct file access on...

EUVD-2026-53258

The endpoint /v3/import/tokenclusterId.yaml retrieves the cluster object before validating the token. When a valid cluster ID references a cluster that has private registry secrets configured, a nil pointer dereference in pkg/systemtemplate/privateregistry.go causes the request to return HTTP 502...

CVE-2026-55998 Cluster Existence Oracle via Unauthenticated Import Endpoint

The endpoint /v3/import/tokenclusterId.yaml retrieves the cluster object before validating the token. When a valid cluster ID references a cluster that has private registry secrets configured, a nil pointer dereference in pkg/systemtemplate/privateregistry.go causes the request to return HTTP 502...

CVE-2026-55998 Cluster Existence Oracle via Unauthenticated Import Endpoint

The endpoint /v3/import/tokenclusterId.yaml retrieves the cluster object before validating the token. When a valid cluster ID references a cluster that has private registry secrets configured, a nil pointer dereference in pkg/systemtemplate/privateregistry.go causes the request to return HTTP 502...

CVE-2026-55996 Unauthenticated Denial-of-Service via TLS SAN Stuffing in Rancher and cattle-cluster-agent

A denial-of-service vulnerability was identified in multiple TLS listeners in Rancher. Both the cattle-cluster-agent component running in downstream clusters and the Rancher server itself use the dynamiclistener library to serve TLS traffic. Without an effective CN filter configured,...

EUVD-2026-53205

KubeSphere's cluster-controller reconciliation pkg/utils/clusterclient/clusterclient.go, addCluster processes every Cluster custom resource's connection configuration and immediately calls Discovery.ServerVersion against the CRD-specified Kubernetes API endpoint, which is parsed only for URL synt...

CVE-2026-71208

KubeSphere CVE-2026-71208 describes SSRF risk in the cluster-controller reconciliation. The addCluster path reads every Cluster CRD’s connection config and calls Discovery().ServerVersion() against the CRD-specified Kubernetes API endpoint, using only URL syntax validation (no allow/deny list for...

CVE-2026-71208 KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation

KubeSphere's cluster-controller reconciliation pkg/utils/clusterclient/clusterclient.go, addCluster processes every Cluster custom resource's connection configuration and immediately calls Discovery.ServerVersion against the CRD-specified Kubernetes API endpoint, which is parsed only for URL synt...

CVE-2026-71208 KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation

KubeSphere's cluster-controller reconciliation pkg/utils/clusterclient/clusterclient.go, addCluster processes every Cluster custom resource's connection configuration and immediately calls Discovery.ServerVersion against the CRD-specified Kubernetes API endpoint, which is parsed only for URL synt...

CVE-2026-71208 KubeSphere - SSRF via Unvalidated Cluster CRD Connection Endpoint in Cluster Reconciliation

KubeSphere's cluster-controller reconciliation pkg/utils/clusterclient/clusterclient.go, addCluster processes every Cluster custom resource's connection configuration and immediately calls Discovery.ServerVersion against the CRD-specified Kubernetes API endpoint, which is parsed only for URL synt...