CVE-2026-40214: Openstack Cyborg

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Openstack Cyborg: from 3.0.0, before 14.0.1 (fixed in 14.0.1); from 15.0.0, before 15.0.1 (fixed in 15.0.1); from 16.0.0, before 16.0.1 (fixed in 16.0.1)

Published 2026-05-07. Last modified 2026-06-17.