---
id: CVE-2026-93538
title: A cross-tenant authorization issue was discovered in SUSE Rancher Fleet
summary: "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…"
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-290
  - CWE-639
vendor: suse
product: rancher_fleet
affected:
  - 'rancher_fleet >= 0.12.0, < 0.12.19'
  - 'rancher_fleet >= 0.13.0, < 0.13.15'
  - 'rancher_fleet >= 0.14.0, < 0.14.10'
  - 'rancher_fleet >= 0.15.0, < 0.15.6'
  - 'rancher_fleet >= 0.16.0, < 0.16.1'
patched:
  - rancher_fleet 0.16.1
published: '2026-09-28'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T17:13:37.180'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93538'
references:
  - url: 'https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr'
    label: meissner@suse.de
tags:
  - nvd
  - cve.org
epss: 0.00171
epssPercentile: 0.06522
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-28T15:46:41.479078Z'
ingestedAt: '2026-09-28T15:13:31.606Z'
---

## Overview

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

- `rancher_fleet >= 0.12.0, < 0.12.19`
- `rancher_fleet >= 0.13.0, < 0.13.15`
- `rancher_fleet >= 0.14.0, < 0.14.10`
- `rancher_fleet >= 0.15.0, < 0.15.6`
- `rancher_fleet >= 0.16.0, < 0.16.1`

## Remediation

Upgrade past the affected range:

- `rancher_fleet 0.16.1`