SUSE Rancher Fleet Priv Escalation via Unrestricted Kubeconfig Ref
CVE-2026-94290 Published on November 2, 2026
Privilege escalation to cluster-admin on the Rancher local cluster through Fleet's agent management controller
SUSE Rancher Fleet clusters reference a kubeconfig secret that the controller uses to install and manage a Fleet agent on the target cluster. The controller did not sufficiently restrict which kubeconfig secrets a Fleet Cluster object was allowed to reference. As a result, a Fleet cluster defined in a namespace an ordinary user controls could be associated with administrative credentials for the management cluster itself, causing the controller to manage the management cluster on that user's behalf and to run that user's Fleet content there with elevated privileges. This affects SUSE Rancher Fleet 0.16.0 up to 0.16.3, 0.15.0 up to 0.15.8, 0.14.0 up to 0.14.12, 0.13.0 up to 0.13.17 and possible older versions.
Vulnerability Analysis
CVE-2026-94290 is exploitable with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Execution with Unnecessary Privileges
The software performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.
Products Associated with CVE-2026-94290
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Affected Versions
SUSE Rancher:- Version 0.16.0 and below 0.16.3 is affected.
- Version 0.15.0 and below 0.15.8 is affected.
- Version 0.14.0 and below 0.14.12 is affected.
- Version 0.13.0 and below 0.13.17 is affected.