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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-71404
StatePUBLISHED
Assignersuse
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-03 15:17:32 UTC
Updated2026-09-08 19:12:59 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 8.7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

EPSS: 0.002520000 probability, percentile 0.165000000 (date 2026-09-08)

Problem Types: CWE-639 | CWE-639 CWE-639 Authorization bypass through User-Controlled key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.7HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
3.1CNACVSS8.7HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SUSE Rancher affected 2.15.1 semver Not specified

References

ReferenceSourceLinkTags
github.com/rancher/rancher/pull/56642 [email protected] github.com
github.com/rancher/rancher/pull/56593 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: https://github.com/Pig-Tail (en)

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