Vulnerability · Published May 7, 2026 · Assigned by mitre
CVE-2026-40214
Medium 6.3
In plain English
A medium-severity security flaw in Cyborg from OpenStack. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | cyborg | 14.0.0-3+deb13u1 | DEBIAN-CVE-2026-40214 |
| Debian:14 | cyborg | 16.0.0+git+2026.04.26.b8edfa06f1-1 | DEBIAN-CVE-2026-40214 |
| PyPI | openstack-cyborg | 16.0.1 | GHSA-mmpc-xjxr-5hf8 |
| PyPI | openstack-cyborg | 16.0.1 | PYSEC-2026-2854 |
| Ubuntu:25.10 | cyborg | 14.0.0-3+deb13u1build0.25.10.1 | USN-8413-1 |
| Ubuntu:25.10 | cyborg | 14.0.0-3+deb13u1build0.25.10.1 | UBUNTU-CVE-2026-40214 |
| Ubuntu:26.04:LTS | cyborg | 16.0.0-2ubuntu0.1 | UBUNTU-CVE-2026-40214 |
| Ubuntu:26.04:LTS | cyborg | 16.0.0-2ubuntu0.1 | USN-8413-1 |
Affected products (as reported)
Weakness: CWE-282 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L