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...

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...

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...

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,...

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,...

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 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'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...

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 - 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...

PT-2026-68046

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 resource...

PT-2026-68062

Name of the Vulnerable Software and Affected Versions Rancher affected versions not specified Description A denial-of-service issue exists in multiple TLS listeners within the Rancher server and the cattle-cluster-agent component. These components utilize the dynamiclistener library to handle TLS...

CVE-2026-55996: Allocation of Resources Without Limits or Throttling

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,...

CVE-2026-71208: Server-Side Request Forgery (SSRF)

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...