CVE-2026-93540 Fleet applies namespace labels and annotations without the bundle's service account privileges

What is CVE-2026-93540?

CVE-2026-93540 is a medium-severity vulnerability in SUSE Rancher, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-266

Which versions are affected by CVE-2026-93540?

It affects 1 product.

Products include Suse Rancher Fleet.

How do I fix CVE-2026-93540?

No fix has been published for CVE-2026-93540 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-93540 being exploited?

There is no known exploitation of CVE-2026-93540 in the wild and no public exploit code.

Other vulnerabilities in SUSE Rancher

• CVE-2026-44935 Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer Critical 9.9
• CVE-2026-41050 Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering Critical 9.9
• CVE-2026-88808 Privilege escalation in Rancher High 8.8
• CVE-2026-44938 Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent High 8.8
• CVE-2026-44937 SUSE Rancher Fleet had an Unauthenticated Webhook: Regex Injection via Unsanitized Repository URL Components High 8.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-m93g-8438-2cgg.