CVE-2026-71404CWE-639

CVE-2026-71404

High · published September 3, 2026

CVSS v3.1
8.7
EPSS
0%
Percentile
35.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00424 · 35.7th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-09-03T19:17Z
Affected products (1)
ProductVersionsFixed in
suse/rancher< 2.15.12.15.1
References (2)
https://github.com/rancher/rancher/pull/56593 · [email protected]https://github.com/rancher/rancher/pull/56642 · [email protected]
EPSS history
Timeline
  • 05 SEP 03:44Z
    EPSS moved — → 0%
    epss
  • 03 SEP 14:51Z
    Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole
    cvelistv5