CVE-2026-88810 (GCVE-0-2026-88810)
Vulnerability from cvelistv5 – Published: 2026-11-02 16:29 – Updated: 2026-11-02 18:54
VLAI
EPSS
VEX
Title
Privilege escalation in downstream clusters via GlobalRole inheritedNamespacedRules
Summary
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.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 18:54 UTC
CWE
- CWE-306 - Missing authentication for critical function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/rancher/webhook/security/advis… | vendor-advisory |
Impacted products
Date Public
2026-11-02 16:21
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