Privilege Escalation in Rancher Manager's Role-Based Access Control
CVE-2026-88810

7.2HIGH

Key Information:

Vendor

Suse
Status
Rancher
Vendor
CVE Published:
2 November 2026

What is CVE-2026-88810?

A privilege escalation issue has been identified in the role-based access control of Rancher Manager. The vulnerability arises from the inheritedNamespacedRules field of a GlobalRole, which transfers permissions into named namespaces of every downstream cluster managed by the Rancher instance without proper privilege escalation validation. Consequently, this enables a non-administrative user to obtain permissions that surpass their existing rights through inappropriate global role bindings in downstream clusters. This flaw specifically affects SUSE Rancher version 2.15.2 and SUSE Rancher Webhook from versions 0.11.0 to 0.11.4 and 0.12.0 to 0.12.1.

Affected Version(s)

Rancher 2.15.2 < 2.15.3

Rancher 0.11.0 < 0.11.4

Rancher 0.12.0 < 0.12.1

References

https://github.com/rancher/webhook/security/advisories/GH...
vendor-advisory

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eurico Nicacio
.