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.
History

Wed, 07 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 06 Oct 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Mon, 05 Oct 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat multicluster Engine For Kubernetes
Vendors & Products Redhat multicluster Engine For Kubernetes

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

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

Updated: 2026-10-07T20:16:09.762Z

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

Link: CVE-2026-101919

cve-icon Vulnrichment

Updated: 2026-10-07T20:16:03.491Z

cve-icon NVD

Status : Awaiting Analysis

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

Modified: 2026-10-07T21:17:07.153

Link: CVE-2026-101919

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-28T00:00:00Z

Links: CVE-2026-101919 - Bugzilla