Auth bypass in Gpustack
CVE-2026-103002
GPUStack 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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Gpustack — versions >= 2.2.0, < 2.2.2
Weakness classification (CWE)
References
- https://github.com/gpustack/gpustack/commit/363191fa1da7e1426c6041f78b3cf00aff2622fe
- https://github.com/gpustack/gpustack/commit/cdd67467e0f314609dc82216e142940d321abfed
- https://github.com/gpustack/gpustack/pull/5911
- https://github.com/gpustack/gpustack/pull/5936
- https://github.com/gpustack/gpustack/releases/tag/v2.2.2
- https://github.com/gpustack/gpustack/security/advisories/GHSA-3hch-x692-6qj3
Frequently asked questions
- What is CVE-2026-103002?
- CVE-2026-103002 is a high-severity vulnerability in Gpustack, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-11-04.
- How severe is CVE-2026-103002?
- High severity. CVSS v3 base score is 8.8 out of 10.