Vulnerability · Published Nov 2, 2026 · Assigned by suse

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

High 7.2

In plain English

A high-severity missing authentication in Rancher from SUSE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.5%top 58.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
SUSE	Rancher	2.15.2 – before 2.15.3
SUSE	Rancher	0.11.0 – before 0.11.40.12.0 – before 0.12.1

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/rancher/webhook/security/advisories/GHSA-f898-2c8h-r7jc vendor-advisory