In OpenStack Cyborg before 16.0.1, the Accelerator Request (ARQ) API does not enforce project ownership at any layer. The project_id column in the database is never populated (NULL for every ARQ), database queries have no project filtering, and policy checks are self-referential (the authorize_wsgi decorator compares the caller's project_id with itself rather than the target resource). Any authenticated non-admin user can complete various actions such as deleting ARQs bound to other projects' instances, aka cross-tenant denial of service.

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Source ID Title
Github GHSA Github GHSA GHSA-mmpc-xjxr-5hf8 OpenStack Cyborg's Accelerator Request (ARQ) API does not enforce project ownership at any layer
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sun, 10 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Openstack
Openstack cyborg
Vendors & Products Openstack
Openstack cyborg

Fri, 08 May 2026 16:00:00 +0000

Type Values Removed Values Added
References

Fri, 08 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 00:45:00 +0000

Type Values Removed Values Added
Title Cross‑Tenant Denial of Service via Unchecked Accelerator Request API

Thu, 07 May 2026 22:15:00 +0000

Type Values Removed Values Added
Description In OpenStack Cyborg before 16.0.1, the Accelerator Request (ARQ) API does not enforce project ownership at any layer. The project_id column in the database is never populated (NULL for every ARQ), database queries have no project filtering, and policy checks are self-referential (the authorize_wsgi decorator compares the caller's project_id with itself rather than the target resource). Any authenticated non-admin user can complete various actions such as deleting ARQs bound to other projects' instances, aka cross-tenant denial of service.
Weaknesses CWE-282
References
Metrics cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-08T15:47:39.031Z

Reserved: 2026-04-10T00:00:00.000Z

Link: CVE-2026-40214

cve-icon Vulnrichment

Updated: 2026-05-08T13:56:35.354Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-07T22:16:35.047

Modified: 2026-05-08T16:16:10.900

Link: CVE-2026-40214

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-10T21:26:31Z

Weaknesses