Vulnerability in SUSE Rancher
CVE-2026-94290
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/rancher/fleet/security/advisories/GHSA-qfmw-gw96-ffcr (vendor-advisory)
Frequently asked questions
- What is CVE-2026-94290?
- CVE-2026-94290 is a critical-severity vulnerability in SUSE Rancher, classified under CWE-250. CVSS score: 9.1/10. Published 2026-11-02.
- How severe is CVE-2026-94290?
- Critical severity. CVSS v3 base score is 9.1 out of 10.