CVE-2026-93538

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:suse:rancher_fleet::::::::
	cpe:2.3:a:suse:rancher_fleet::::::::
	cpe:2.3:a:suse:rancher_fleet::::::::
	cpe:2.3:a:suse:rancher_fleet::::::::
	cpe:2.3:a:suse:rancher_fleet::::::::

History

07 Oct 2026, 17:13

Type	Values Removed	Values Added
References	~~() https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr -~~	() https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr - Vendor Advisory
First Time		Suse Suse rancher Fleet
CPE		cpe:2.3:a:suse:rancher_fleet::::::::

28 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 15:17

Updated : 2026-10-07 17:13

NVD link : CVE-2026-93538

Mitre link : CVE-2026-93538

CVE.ORG link : CVE-2026-93538

JSON object : View

Products Affected

suse

rancher_fleet

CWE

CWE-290

Authentication Bypass by Spoofing

CWE-639

Authorization Bypass Through User-Controlled Key

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