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

Quick assessment

Affected
SUSE Rancher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 SUSE Rancher Fleet 的集群注册流程中发现了一个安全漏洞，影响版本为：0.12 之前的版本、0.13.0 至 0.13.17、0.14.0 至 0.14.12、0.15.0 至 0.15.17，以及 0.16.0 至 0.16.3。该漏洞表现为：注册请求所声明的集群身份在未与请求所使用的注册令牌进行绑定的情况下即被接受。因此，注册请求可能被关联到最初使用不同注册令牌注册的受管集群。

CVSS 7.9 · High
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I. Basic Information for CVE-2026-104615

Vulnerability Information
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Vulnerability Title
Cluster identity takeover in Fleet cluster registration allows access to another cluster's Fleet namespace
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 0.16.0 ~ 0.16.3 -

II. Public POCs for CVE-2026-104615

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III. Intelligence Information for CVE-2026-104615

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Other References for CVE-2026-104615 (1)

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-290