CVE-2026-102895: GPUStack Improper Authentication Vulnerability

Affected versions

Product	Affected versions	Fixed in
Gpustack Gpustack	before 2.2.0	2.2.0

Required action (CISA's text)

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.

Description (NVD)

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.

SOURCES

• NVDNVD entry for CVE-2026-102895
• CISA KEVCISA Known Exploited Vulnerabilities catalog
• GITHUBgithub.com/gpustack/gpustack/security/advisories/GHSA-gj9m-…

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.