Auth bypass in SUSE Rancher
CVE-2026-88810
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/rancher/webhook/security/advisories/GHSA-f898-2c8h-r7jc (vendor-advisory)
Frequently asked questions
- What is CVE-2026-88810?
- CVE-2026-88810 is a high-severity vulnerability in SUSE Rancher, classified under Missing Authentication for Critical Function. CVSS score: 7.2/10. Published 2026-11-02.
- How severe is CVE-2026-88810?
- High severity. CVSS v3 base score is 7.2 out of 10.