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CVE-2026-71404— Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole

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 Rancher Manager 中发现了一个漏洞。GlobalRole 控制器从用户可设置的 注解中获取目标 ClusterRole 的名称，并在未验证所有权的情况下直接覆盖该对象的权限规则。拥有被委托的 GlobalRole 创建或更新权限的用户可以将该注解指向任意现有的 ClusterRole（例如 ），从而撤销所有绑定到该角色上的主体的权限。即使删除了恶意创建的 GlobalRole，这一权限变更仍然会保留。 该问题影响 Rancher 版本 2.15.1 之前的所有版本。

CVSS 8.7 · High

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
SUSE Rancher < 2.15.1 affected
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I. Basic Information for CVE-2026-71404

Vulnerability Information
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Vulnerability Title
Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Rancher Manager. The GlobalRole controller derived the target ClusterRole name from the user-settable `authz.management.cattle.io/cr-name` annotation and overwrote that object's rules without verifying ownership. A user with delegated GlobalRole create or update permission could point the annotation at any existing ClusterRole, such as `cluster-admin`, and revoke the permissions of every principal bound to it. The change persists after the malicious GlobalRole is deleted. This issue affects Rancher: before 2.15.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 0 ~ 2.15.1 -

II. Public POCs for CVE-2026-71404

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III. Intelligence Information for CVE-2026-71404

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Same Patch Batch · SUSE · 2026-09-03 · 6 CVEs total

CVE-2026-75033 7.7 HIGH Rancher: Cross-Cluster Secret Leakage via Namespace projectId Annotation Spoofing
CVE-2026-75035 7.7 HIGH Rancher: ext.cattle.io/v1 Token store: cross-user token disclosure via label-selector scop
CVE-2026-75034 7.4 HIGH Rancher: SAML Assertion Replay
CVE-2026-71403 6.1 MEDIUM Rancher: Identity-field mutation in /v3/users allows account hijack via principal rebind
CVE-2026-75036 5.3 MEDIUM Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-639

V. Comments for CVE-2026-71404

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