Vulnerability in Gpustack
CVE-2026-102894
GPUStack is an open-source GPU cluster manager for AI model serving and GPU instance provisioning. From 0.7.1 until 2.2.2, the /auth/saml/callback endpoint decoded SAML XML, used its NameID and attributes to resolve or provision a user, and minted a gpustack_session JWT without calling OneLogin_Saml2_Auth.process_response to verify the signature, issuer, audience, destination, or time conditions. Any network client could submit an identity for an existing user, including an administrator, or provision a new non-administrator account, even when SAML was not configured. Response and Assertion identifiers were not consumed, so captured signed responses could also be replayed. This issue is fixed in version 2.2.2.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
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 >= 0.7.1, < 2.2.2
Weakness classification (CWE)
References
- https://github.com/gpustack/gpustack/commit/705edbe1b5feec63959306daecd640e1c70eced2
- https://github.com/gpustack/gpustack/commit/adc6d82be34e48390720a1361df616e2ea9d6d45
- https://github.com/gpustack/gpustack/pull/5753
- https://github.com/gpustack/gpustack/pull/5923
- https://github.com/gpustack/gpustack/releases/tag/v2.2.2
- https://github.com/gpustack/gpustack/security/advisories/GHSA-62m9-f875-rqw6
Frequently asked questions
- What is CVE-2026-102894?
- CVE-2026-102894 is a critical-severity vulnerability in Gpustack, classified under Authentication Bypass by Capture-replay. CVSS score: 9.1/10. Published 2026-11-04.
- How severe is CVE-2026-102894?
- Critical severity. CVSS v3 base score is 9.1 out of 10.