CVE-2026-88810

Privilege escalation in downstream clusters via GlobalRole inheritedNamespacedRules

Published Nov 2, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Privilege escalation in downstream clusters via GlobalRole inheritedNamespacedRules
First Time appeared Suse
Suse rancher
Weaknesses CWE-306
CPEs cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*
Vendors & Products Suse
Suse rancher
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
suse
Published
Updated
Nov 3, 2026, 4:55 AM
Reserved
Sep 10, 2026, 8:35 AM
Status
Awaiting Analysis
Published
Nov 2, 2026, 5:17 PM
Modified
Nov 3, 2026, 5:18 AM