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Rancher Manager CVE-2026-71404

| EUVDEUVD-2026-70504 HIGH
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-09-03 suse
8.7
CVSS 3.1 · Vendor: suse
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Severity by source

Vendor (suse) PRIMARY
8.7 HIGH
AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
vuln.today AI
8.7 HIGH

PR:H reflects required delegated GlobalRole write permission; S:C because impact propagates into Kubernetes ClusterRoles outside the GlobalRole object; C:N as no data is disclosed.

3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H
SUSE
HIGH
qualitative

Primary rating from Vendor (suse).

CVSS VectorVendor: suse

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
High

Lifecycle Timeline

4
Metadata Corrected
Sep 03, 2026 - 15:40 vuln.today
tag: Authentication Bypass replaced by Privilege Escalation
Source Code Evidence Fetched
Sep 03, 2026 - 15:23 vuln.today
Analysis Generated
Sep 03, 2026 - 15:23 vuln.today
CVE Published
Sep 03, 2026 - 14:51 cve.org
HIGH 8.7

DescriptionCVE.org

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.

AnalysisAI

Privilege escalation in Rancher Manager before 2.15.1 allows any user with delegated GlobalRole create or update permission to permanently destroy cluster-wide Kubernetes RBAC policies by hijacking arbitrary ClusterRoles. The GlobalRole controller resolved its target ClusterRole by reading the user-settable authz.management.cattle.io/cr-name annotation rather than deriving the name from the GlobalRole's own identity, enabling an authenticated attacker to redirect the controller at any ClusterRole - including cluster-admin - and overwrite its rules. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
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Delivery
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Exploit
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Install
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C2
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Execute
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the attacker holds a Rancher account with explicitly delegated permission to create or update GlobalRole objects - this is a non-default administrative delegation that Rancher admins can grant to sub-administrators. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vendor-assigned CVSS 8.7 (AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H) is well-calibrated. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade Rancher Manager to version 2.15.1 or later, which incorporates the changes from upstream PRs #56642 and #56593. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all Rancher Manager deployments and confirm versions currently in use; temporarily restrict delegated GlobalRole create and update permissions to essential administrators only. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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Vendor StatusVendor

SUSE

Severity: Important

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CVE-2026-71404 vulnerability details – vuln.today

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