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CVE-2026-88810— Privilege escalation in downstream clusters via GlobalRole inheritedNamespacedRules

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 的基于角色的访问控制（RBAC）中发现了一个权限提升漏洞。GlobalRole 的 字段会将权限传播到由 Rancher 实例管理的每个下游集群的命名空间中，但该字段未像 GlobalRole 的其他携带权限的字段那样接受权限提升验证。因此，非管理员用户可通过全局角色绑定（global role binding），在下游集群中获得超出其现有权限的访问权限。 此漏洞仅影响以下版本： SUSE Rancher 2.15.2 SUSE Rancher Webhook 0.11.0 至

CVSS 7.2 · High EPSS 0.48% · P41

Affected Version Matrix 3

VendorProduct Version RangeStatus
SUSE Rancher 2.15.2< 2.15.3 affected
0.11.0< 0.11.4 affected
0.12.0< 0.12.1 affected
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I. Basic Information for CVE-2026-88810

Vulnerability Information
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Vulnerability Title
Privilege escalation in downstream clusters via GlobalRole inheritedNamespacedRules
Source: CVE Program / CVE List V5
Vulnerability Description
A privilege escalation issue was discovered in Rancher Manager's role-based access control. The inheritedNamespacedRules field of a GlobalRole propagates permissions into named namespaces of every downstream cluster managed by the Rancher instance, but it was not subject to the privilege-escalation validation applied to the other permission-carrying fields of a GlobalRole. As a result, a non-administrative user could be granted, through a global role  binding, permissions in downstream clusters that exceed the permissions that user already holds. This affected SUSE Rancher 2.15.2 only, and SUSE Rancher Webhook 0.11.0 up to 0.11.4, and 0.12.0 up to 0.12.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 2.15.2 ~ 2.15.3 -
SUSE Rancher 0.11.0 ~ 0.11.4 -

II. Public POCs for CVE-2026-88810

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III. Intelligence Information for CVE-2026-88810

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Other References for CVE-2026-88810 (1)

Same Patch Batch · SUSE · 2026-11-02 · 4 CVEs total

CVE-2026-94290 9.1 CRITICAL Privilege escalation to cluster-admin on the Rancher local cluster through Fleet's agent m
CVE-2026-88811 9.1 CRITICAL Rancher credentials disclosed to third-party hosts by the Rancher Manager meta proxy
CVE-2026-88809 7.6 HIGH Rancher meta proxy allowlist bypass leading to server-side request forgery

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-306