Privilege escalation in SUSE Rancher
CVE-2026-93540
A privilege mismatch was found in Fleet. When a bundle requested namespace labels or annotations through the namespaceLabels and namespaceAnnotations options, the resulting namespace metadata update was not subject to the same authorization as the rest of the bundle's deployment. As a result, a bundle could change labels and annotations on a target namespace even when the identity it was pinned to was not authorized to modify that namespace. This affected SUSE Rancher Fleet 0.16 before 0.16.2, 0.15 before 0.15.7, 0.14 before 0.14.11, 0.13 before 0.13.16 and potentially older versions.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
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-m93g-8438-2cgg (vendor-advisory)
Frequently asked questions
- What is CVE-2026-93540?
- CVE-2026-93540 is a medium-severity vulnerability in SUSE Rancher, classified under Incorrect Privilege Assignment. CVSS score: 6.5/10. Published 2026-09-28.
- How severe is CVE-2026-93540?
- Medium severity. CVSS v3 base score is 6.5 out of 10.