CVE-2026-19706

Openshift/installer: openshift installer: unconditional csr approval during agent-based installation (abi) bootstrap

During ABI bootstrap, the bootstrap node's approve-csr.service approves and signs every CSR without identity validation. An attacker on the install network can retrieve the unauthenticated Ignition file (ports 22623/22624), extract a limited kubeconfig, submit a CSR for CN=system:admin, receive the signed certificate, and gain full cluster-admin access. Exploitable only during the narrow bootstrap window.

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Assisted Installer Assisted Installer For Red Hat Openshift Container Platform Multicluster Engine and 3 more

CVE-2026-114236

Podman: goroutine/file-descriptor leak in storage/pkg/archive.applylayer and applyuncompressedlayer on malformed layers

storage/pkg/archive.ApplyLayer and ApplyUncompressedLayer may, when processing corrupt or malicious inputs, leak a file descriptor; unbounded repeated calls can exhaust the process’ file descriptor limit

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Advanced Cluster Security Ansible Automation Platform Certifications and 16 more

CVE-2026-10805

Networkmanager: networkmanager: local privilege escalation via malformed mud urls in dhclient backend

A flaw was found in NetworkManager. This local privilege escalation vulnerability exists in NetworkManager's dhclient backend when processing malformed Manufacturer Usage Description (MUD) URLs. A local user can exploit this flaw to escalate privileges by triggering a script via a crafted MUD URL, provided an administrator has explicitly configured NetworkManager to use dhclient. This issue does not affect default configurations of NetworkManager.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Hummingbird Jboss Enterprise Application Platform Expansion Pack and 12 more

CVE-2024-3727

Containers/image: digest type does not guarantee valid type

A flaw was found in the github.com/containers/image library. This flaw allows attackers to trigger unexpected authenticated registry accesses on behalf of a victim user, causing resource exhaustion, local path traversal, and other attacks.

CVSS 3.1 · 8.3 High EPSS 1.3% KEV · Not listed

Vendors

Redhat

Products

Acm Advanced Cluster Security Ansible Automation Platform and 16 more

CVE-2026-29063

Immutable.js: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable

Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Immutable-js Redhat

Products

Immutable Immutable-js 3scale Api Management Platform and 25 more

CVE-2026-71299

Maestro: maestro: rest api write endpoints registered without authentication middleware

A flaw was found in Maestro. Its REST API write endpoints were registered without proper authentication middleware. This allows a remote attacker to perform unauthorized write operations, such as creating, modifying, or deleting consumers and resource bundles. This could lead to data integrity issues or a denial of service (DoS).

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Maestro Redhat

Products

Maestro Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-101919

Hypershift: hypershift: unsanitized kubeconfig passthrough from tenant namespace to control plane

A flaw was found in the HyperShift operator. The operator copies user-provided Kubernetes configuration (kubeconfig) secrets directly into the privileged control plane namespace without proper validation or sanitization. An authenticated user with cluster and secret creation permissions can exploit this vulnerability by supplying a configuration containing unauthorized executable plugins. When downstream controllers consume this configuration, an attacker can achieve arbitrary code execution within the control plane.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-71298

Maestro: sql identifier injection via properties.* search filter and orderby field

A flaw was found in maestro. A remote attacker could exploit a SQL injection vulnerability in the `orderBy` query parameter of its REST API list endpoints. This flaw, which does not require authentication, allows for read-only blind extraction of data from the database.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed

Vendors

Maestro Redhat

Products

Maestro Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-71297

Maestro: maestro: grpc broker has no auth interceptor and client mtls is optional

A flaw was found in the maestro gRPC broker. This vulnerability allows a remote attacker, with a valid client certificate, to bypass authentication. This bypass enables the attacker to subscribe to other consumers' event streams, leading to unauthorized information disclosure, or to publish forged agent status, which can compromise data integrity.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Maestro Redhat

Products

Maestro Multicluster Engine

CVE-2026-17107

Cluster-proxy: impersonation-header injection grants cluster-admin on every managed cluster

A flaw was found in the cluster-proxy service-proxy component used in Red Hat Advanced Cluster Management for Kubernetes (RHACM) and multicluster-engine (MCE). The service-proxy appends impersonation group headers to proxied requests without first removing caller-supplied values, and the spoke ServiceAccount holds unrestricted impersonation permissions. An authenticated hub principal can inject an Impersonate-Group header to escalate to cluster-admin on every managed cluster.

CVSS 3.1 · 8.5 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine

CVE-2026-73267

Clusterclaims-controller: managedcluster deletion keyed solely on clusterclaim.spec.namespace with no local ownership check

A flaw was found in the clusterclaims-controller component of multicluster engine (MCE). A tenant with standard permissions to create and delete ClusterClaim resources can exploit this by manipulating the `spec.namespace` field. This allows the tenant to specify and delete any ManagedCluster, including the hub's local-cluster or other tenants' clusters, due to a missing ownership check. This vulnerability can lead to a denial of service by enabling unauthorized deletion of ManagedClusters.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-73266

Clusterclaims-controller: confused deputy: tenant-controlled clusterclaim labels propagated to managedcluster, enabling cross-tenant managedclusterset join

A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). An authenticated tenant can exploit this vulnerability by manipulating ClusterClaim labels. This allows the tenant to force a cluster to join a ManagedClusterSet belonging to another tenant. Such unauthorized access could enable the injection of policies and workloads into other tenants' clusters.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-75569

Mce-operator-bundle: all github actions pinned by mutable tag, not commit sha

A flaw was found in mce-operator-bundle. The build process fetches and executes scripts from a remote repository without performing integrity checks, such as commit pinning or signature verification. This allows a malicious actor with write access to the remote repository to inject and execute arbitrary code during the build. The consequence is a compromised build process, potentially leading to the distribution of malicious software.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-66795

Managedcluster-import-controller: csr auto-approver does not validate certificate subject or signername (spoke→hub cluster-admin)

A flaw was found in the managedcluster-import-controller. The Certificate Signing Request (CSR) auto-approval logic improperly validates incoming CSRs, specifically by not inspecting the signer name or decoding the PEM-encoded x509 CSR. This vulnerability allows a privileged service account on a spoke cluster to submit a malicious CSR. Successful exploitation can lead to privilege escalation, enabling the attacker to obtain administrative credentials on the hub cluster.

CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine

CVE-2026-16242

Hypershift: konnectivity proxy-server accepts agent connections without validating client certificates

A flaw was found in the Konnectivity proxy-server configuration for hosted control planes. The agent-facing listener was started without --cluster-ca-cert (and without token-based agent authentication), so client certificates were not validated. A remote attacker who can reach the Konnectivity cluster endpoint could connect as an unauthenticated agent, join the routing pool, and potentially proxy, inspect, modify, or drop control-plane-to-node traffic.

CVSS 3.1 · 9.4 Critical EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Acm Advanced Cluster Management For Kubernetes Logging and 7 more

CVE-2026-73269

Cluster-curator-controller: cluster-curator-controller: tenant-controllable trigger creates clusterrolebinding granting cluster-wide secrets access to namespace-local sa

A flaw was found in the cluster-curator-controller component. A local user, by creating a ClusterCurator resource with a specific naming convention, can trigger the creation of a cluster-scoped ClusterRoleBinding. This allows the user to escalate their privileges from namespace-local access to cluster-wide control. This privilege escalation grants broad permissions, including the ability to access and manipulate secrets, manage cluster actions, and delete hosted clusters or node pools.

CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-73268

Cluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows arbitrary job spec injection

A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets.

CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-66794

Cluster-proxy-addon: cluster-proxy-addon: unauthenticated ssrf to arbitrary managed-cluster services via public route

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.

CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

CVE-2026-19130

Provider-credential-controller: provider-credential-controller: cross-namespace credential propagation via attacker-controlled copiedfrom labels bypasses authorization

A flaw was found in the provider-credential-controller component of multicluster-engine (MCE). An attacker with specific permissions on the hub cluster, and knowledge of a prior credential value, could exploit an authorization bypass vulnerability. By manipulating `copiedFrom` labels, the attacker could intercept newly rotated provider credentials, leading to unauthorized information disclosure. This allows access to sensitive credentials that should otherwise be protected.

CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes

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 token for a ServiceAccount with cluster-wide administrative authority. This leads to a privilege escalation, allowing the tenant administrator to gain full control over the cluster.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Multicluster Engine Multicluster Engine For Kubernetes