Auth bypass in SUSE Rancher
CVE-2026-71404
A flaw was found in Rancher Manager. The GlobalRole controller derived the target ClusterRole name from the user-settable `authz.management.cattle.io/cr-name` annotation and overwrote that object's rules without verifying ownership. A user with delegated GlobalRole create or update permission could point the annotation at any existing ClusterRole, such as `cluster-admin`, and revoke the permissions of every principal bound to it. The change persists after the malicious GlobalRole is deleted. This issue affects Rancher: before 2.15.1.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/rancher/rancher/pull/56593 (Patch, patch, Issue Tracking)
- github.com/rancher/rancher/pull/56642 (Patch, patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-71404?
- CVE-2026-71404 is a high-severity vulnerability in SUSE Rancher, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.7/10. Published 2026-09-03.
- How severe is CVE-2026-71404?
- High severity. CVSS v3 base score is 8.7 out of 10.