Is CVE-2026-93538 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-93538 being exploited in the wild.

How severe is CVE-2026-93538?

High severity, with a CVSS score of 7.1, published 28 September 2026.

Which products and versions are affected?

Suse Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19, and older versions.

Is there a fix for CVE-2026-93538?

A patch was published on 2026-09-23: Patches released for v0.16.1, v0.15.6, v0.14.10, v0.13.15, v0.12.19 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-93538 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-93538?

Check whether you run Suse Rancher Fleet at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-93538: SUSE Rancher Fleet cross-tenant authorization bypass via cluster labels

CVE-2026-93538 · Severity: high · CVSS 7.1 · Published 2026-09-28

SUSE Rancher Fleet is a multi-tenant cluster management platform. A flaw allows an attacker to register a malicious cluster with spoofed labels that match another tenant's deployment targets, causing it to receive bundles and secrets intended for different clusters. This results in disclosure of other tenants' deployment configurations, resolved Helm values, and potentially unauthorized workload deployment.

Technologies: Suse Rancher Fleet. Vendors: Suse.

Quick answers

Is CVE-2026-93538 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-93538 being exploited in the wild.
How severe is CVE-2026-93538?: High severity, with a CVSS score of 7.1, published 28 September 2026.
Which products and versions are affected?: Suse Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19, and older versions.
Is there a fix for CVE-2026-93538?: A patch was published on 2026-09-23: Patches released for v0.16.1, v0.15.6, v0.14.10, v0.13.15, v0.12.19 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-93538 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-93538?: Check whether you run Suse Rancher Fleet at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A cross-tenant authorization bypass occurs during agent-initiated cluster registration when reserved label keys in the management.cattle.io/ namespace supplied by a registering agent are applied to the upstream Cluster object without validation. Since Fleet resolves GitRepo and Bundle targets using these cluster labels, an attacker sharing a workspace namespace with other tenants can craft cluster labels to satisfy targeting rules intended for different clusters, causing BundleDeployment and Secret objects to be created in their controlled namespace. The fix discards agent-supplied reserved labels and only honors labels set by the management plane after registration.

Affected products

SUSE Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19, and older versions

Timeline

2026-09-23: disclosed
2026-09-28: advisory
2026-09-23: patched: Patches released for v0.16.1, v0.15.6, v0.14.10, v0.13.15, v0.12.19

References

https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr

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