Upstream information
Description
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.SUSE information
Overall state of this security issue: Revisit
This issue is currently rated as having critical severity.
| CVSS detail | CNA (SUSE) |
|---|---|
| Base Score | 9.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | High |
| User Interaction | None |
| Scope | Changed |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
SUSE Security Advisories:
- GHSA-qfmw-gw96-ffcr, published Thu Oct 29 21:09:53 CET 2026
SUSE Timeline for this CVE
CVE page created: Fri Oct 30 12:56:04 2026CVE page last modified: Mon Nov 2 20:55:02 2026