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7.9 High

CVE-2026-104615 Cluster identity takeover in Fleet cluster registration allows access to another cluster's Fleet namespace

Description

A security vulnerability was discovered in SUSE Rancher Fleet's cluster registration flow, in Fleet versions before 0.12, 0.13.0 up to 0.13.17, 0.14.0 up to 0.14.12, 0.15.0 up t o 0.15.17 and 0.16.0 up to 0.16.3. The cluster identity claimed by a registration request was accepted without being bound to the registration token that the request was made with. As a result, a registration request could be associated with a managed cluster that was originally registered with a different registration token.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H

Exploitable remotely over the network, with an administrator account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
High
Privileges required
High
Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
High

Affected products and versions

Product Affected versions Fixed in
Rancher 0.16 0.16.0 → < 0.16.3 0.16.3
Rancher 0.15 earliest → < 0.15.17 0.15.17
Rancher 0.14 0.14.0 → < 0.14.12 0.14.12
Rancher 0.13 0.13 → < 0.13.17 0.13.17
Rancher 0.12 earliest → 0.12 No fix stated

Other CVEs of Rancher

The 86 CVEs of Rancher →
CVE-2026-88811 Missing filtering in the SUSE Rancher Manager meta proxy could cause passed in rancher credentials to be leaked to cloud… 9.1 Critical CVE-2026-88810 A privilege escalation issue was discovered in Rancher Manager's role-based access control 7.2 High CVE-2026-88809 A security vulnerability exists in the SUSE Rancher Manager meta proxy endpoint (/meta/proxy) 7.6 High CVE-2026-94290 SUSE Rancher Fleet clusters reference a kubeconfig secret that the controller uses to install and manage a Fleet agent… 9.1 Critical
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