What’s Vulnerable › Vulnerabilities

CVE-2026-71404: Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole

• Severity: high (CVSS 8.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-03 · updated 2026-09-18
• Weakness: CWE-639

Description

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.

Affected products

• SUSE Rancher: before 2.15.1 — fixed in 2.15.1

How to fix

Upgrade to a fixed version: SUSE Rancher 2.15.1. Check the vendor advisory for mitigations.

References

• https://github.com/rancher/rancher/pull/56593
• https://github.com/rancher/rancher/pull/56642

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