GPUStack: Missing authorization on several cluster and resource endpoints allows cross-user access and cluster takeover

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Summary

CVECVE-2026-103002
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 22:17:44 UTC
Updated2026-11-06 12:17:15 UTC
DescriptionGPUStack is an open-source GPU cluster manager for AI model serving and GPU instance provisioning. From 2.2.0 until 2.2.2, cluster_apiserver_proxy forwarded an authenticated non-administrator's requests to a selected Kubernetes cluster without a resource-level authorization check. The proxy used a reachable worker's Kubernetes ServiceAccount credentials, so the caller could read sensitive resources, create or modify workloads, or delete resources according to that ServiceAccount's permissions. Exploitation required a Kubernetes-provider cluster with a reachable worker, and attacker-controlled workloads could result in code execution in the target cluster. This issue is fixed in version 2.2.2.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.003600000 probability, percentile 0.299770000 (date 2026-11-06)

Problem Types: CWE-639 | CWE-862 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gpustack Gpustack affected >= 2.2.0, < 2.2.2 Not specified

References

ReferenceSourceLinkTags
github.com/gpustack/gpustack/security/advisories/GHSA-3hch-x692-6qj3 [email protected] github.com
github.com/gpustack/gpustack/pull/5936 [email protected] github.com
github.com/gpustack/gpustack/releases/tag/v2.2.2 [email protected] github.com
github.com/gpustack/gpustack/commit/363191fa1da7e1426c6041f78b3cf00aff26... [email protected] github.com
github.com/gpustack/gpustack/commit/cdd67467e0f314609dc82216e142940d321a... [email protected] github.com
github.com/gpustack/gpustack/pull/5911 [email protected] github.com
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