Cluster identity takeover in Fleet cluster registration allows access to another cluster's Fleet namespace

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-104615
StatePUBLISHED
Assignersuse
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-30 16:17:36 UTC
Updated2026-11-06 17:17:11 UTC
DescriptionA security vulnerability was discovered in SUSE Rancher Fleet's cluster registration flow, in Fleet versions before 0.12, 0.13.0 up to 0.13.17, 0.14.0 up to 0.14.12, 0.15.0 up t o 0.15.17 and 0.16.0 up to 0.16.3. The cluster identity claimed by a registration request was accepted without being bound to the registration token that the request was made with. As a result, a registration request could be associated with a managed cluster that was originally registered with a different registration token.

Risk And Classification

Primary CVSS: v3.1 7.9 HIGH from [email protected]

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

EPSS: 0.002210000 probability, percentile 0.127770000 (date 2026-11-07)

Problem Types: CWE-290 | CWE-290 CWE-290 Authentication bypass by spoofing

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.9HIGHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H
3.1CNACVSS7.9HIGHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SUSE Rancher affected 0.16.0 0.16.3 semver Not specified
CNA SUSE Rancher affected 0.15.0. 0.15.17 semver Not specified
CNA SUSE Rancher affected 0.14.0 0.14.12 semver Not specified
CNA SUSE Rancher affected 0.13 0.13.17 semver Not specified
CNA SUSE Rancher affected 0.12 semver Not specified

References

ReferenceSourceLinkTags
github.com/rancher/fleet/security/advisories/GHSA-gx8v-2929-9q95 [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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