CVE-2026-40214CWE-282

In OpenStack Cyborg before 16.0.1, the Accelerator Request (ARQ) API does not enforce project ownership at any layer

Medium · published May 7, 2026

CVSS v3.1
6.3
EPSS
0%
Percentile
10.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00206 · 10.7th percentile
Weakness
CWE-282 · Improper Ownership Management
Published
2026-05-07T00:00Z
EPSS history
Timeline
  • 07 MAY 00:00Z
    In OpenStack Cyborg before 16.0.1, the Accelerator Request (ARQ) API does not enforce project ownership at any layer
    cvelistv5