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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-101919

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-101919

Multicluster Engine for Kubernetes

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Engine for Kubernetes",
    "packageName": "multicluster-engine/hypershift-rhel9-operator",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-101919

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#12243 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement