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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

History

Mon, 05 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Hypershift: hypershift: unsanitized kubeconfig passthrough from tenant namespace to control plane
First Time appeared Redhat
Redhat multicluster Engine
Weaknesses CWE-20
CPEs cpe:/a:redhat:multicluster_engine
Vendors & Products Redhat
Redhat multicluster Engine
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-05T17:33:44.331Z

Reserved: 2026-09-28T15:59:56.062Z

Link: CVE-2026-101919

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-05T18:17:30.907

Modified: 2026-10-05T18:17:30.907

Link: CVE-2026-101919

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-05T18:30:19Z

Weaknesses