What’s Vulnerable › Vulnerabilities
CVE-2026-93538: Cross-tenant BundleDeployment and Secret disclosure via spoofed cluster labels during agent-initiated registration in Fleet
- Severity: high (CVSS 7.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-28 · updated 2026-10-07
- Weakness: CWE-290
Description
A cross-tenant authorization issue was discovered in SUSE Rancher Fleet. During agent-initiated cluster registration, cluster labels supplied by the registering agent, including labels in the reserved management.cattle.io/ namespace such as the cluster display name label, were applied to the resulting upstream Cluster object. Because Fleet resolves GitRepo and Bundle targets from those cluster labels, a party able to register a cluster into a Fleet workspace namespace shared with other tenants could cause its own cluster to satisfy targeting rules that administrators intended for a different cluster. This affects 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.
Affected products
- SUSE Fleet: from 0.12.0 before 0.12.19; from 0.13.0 before 0.13.15; from 0.14.0 before 0.14.10; from 0.15.0 before 0.15.6; from 0.16.0 before 0.16.1 — fixed in 0.12.19, 0.13.15, 0.14.10, 0.15.6, 0.16.1
How to fix
Upgrade to a fixed version: SUSE Fleet 0.12.19, 0.13.15, 0.14.10, 0.15.6. Check the vendor advisory for mitigations.
References
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