OpenStack Cyborg's Accelerator Request (ARQ) API does not enforce project ownership at any layer
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | openstack-cyborg | < 16.0.1 | 16.0.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-40214
- https://bugs.launchpad.net/openstack-cyborg/+bug/2144056
- https://github.com/openstack/cyborg
- https://security.openstack.org/ossa/OSSA-2026-011.html
- https://www.openwall.com/lists/oss-security/2026/05/07/6
- https://pypi.org/project/openstack-cyborg
- https://github.com/advisories/GHSA-mmpc-xjxr-5hf8
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-282- Platform
- Python (PyPI)
- Package
openstack-cyborg- Disclosed
- 08.05.2026
- Updated
- 11.10.2026 14:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2854 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-mmpc-xjxr-5hf8 - CC BY 4.0
Vulnerability history: openstack-cyborg
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 05.2026 05.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2026: 2
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OpenStack Cyborg's Accelerator Request (ARQ) API does not enforce project ownership at any layer this entry
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