# CVE-2026-102895: GPUStack: Authentication bypass via trusted loopback source (reverse-proxy TCP peer or X-GPUStack-Real-IP header) grants unauthenticated admin

> CVE-2026-102895: GPUStack: Authentication bypass via trusted loopback source (reverse-proxy TCP peer or X-GPUStack-Real-IP header) grants unauthenticated admin. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-102895
Last updated: 2026-11-10T05:17:40Z

- Published: 2026-11-04 21:16 UTC · Updated: 2026-11-10 05:17 UTC · Assigner: GitHub\_M
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 0.55%, 47th percentile (scored 2026-11-10)
- CISA KEV: yes, added 2026-11-09, federal due date 2026-11-12, ransomware use: Unknown
- CWE: CWE-287, CWE-290, CWE-346

## Description

GPUStack is an open-source GPU cluster manager for AI model serving and GPU instance provisioning. Prior to 2.2.0, get\_current\_user in gpustack/api/auth.py treated a loopback request source as the built-in administrator when force\_auth\_localhost was false, which was the default. A remote request could appear to originate from 127.0.0.1 because client\_ip\_getter accepted a same-host reverse proxy peer or a client-supplied X-GPUStack-Real-IP loopback value. The bypass allowed unauthenticated administrative access, including user and model changes, persistent administrator API-key creation, disclosure of worker and cloud-provider secrets, and code execution through POST /v2/inference-backends/from-yaml. Exploitation was observed in the wild against a 2.1.1 deployment. This issue is fixed in version 2.2.0.

## CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

## Affected vendors and products

- gpustack: gpustack

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-102895)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-102895)
- [https://github.com/gpustack/gpustack/commit/53f42a6a553542974396d16a4ff6b12bcbedb48d](https://github.com/gpustack/gpustack/commit/53f42a6a553542974396d16a4ff6b12bcbedb48d)
- [https://github.com/gpustack/gpustack/pull/5346](https://github.com/gpustack/gpustack/pull/5346)
- [https://github.com/gpustack/gpustack/releases/tag/v2.2.0](https://github.com/gpustack/gpustack/releases/tag/v2.2.0)
- [https://github.com/gpustack/gpustack/security/advisories/GHSA-gj9m-f8ph-pmhr](https://github.com/gpustack/gpustack/security/advisories/GHSA-gj9m-f8ph-pmhr)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-102895 · Markdown: https://rewindex.com/cve/CVE-2026-102895.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-102895 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-11T04:21:44.174Z