CVE-2026-93538: Suse Rancher Fleet

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

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 Rancher Fleet: from 0.12.0, before 0.12.19 (fixed in 0.12.19); from 0.13.0, before 0.13.15 (fixed in 0.13.15); from 0.14.0, before 0.14.10 (fixed in 0.14.10); from 0.15.0, before 0.15.6 (fixed in 0.15.6); from 0.16.0, before 0.16.1 (fixed in 0.16.1)

Published 2026-09-28. Last modified 2026-10-07.