CVE-2026-40214 json
OpenStack Cyborg's Accelerator Request (ARQ) API does not enforce project ownership at any layer
published 2026-05-07 6 mo ago modified 2026-10-26 13 d ago also GHSA-mmpc-xjxr-5hf8 , PYSEC-2026-2854 , EUVD-2026-28456
- cvss
- 6.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi openstack-cyborg 16.0.1
- OpenStack Cyborg 14.0.1, 15.0.1, 16.0.1
- cyborg Debian 13 14.0.0-3+deb13u1
- cyborg Debian 14 16.0.0+git+2026.04.26.b8edfa06f1-1
debian advisories DEBIAN-CVE-2026-40214
- cyborg Ubuntu 25.10 14.0.0-3+deb13u1build0.25.10.1
- cyborg Ubuntu 26.04 LTS 16.0.0-2ubuntu0.1
ubuntu advisories UBUNTU-CVE-2026-40214
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| GitHub | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| OSV | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | openstack-cyborg | <16.0.1 |
16.0.1 |
Affected products
- OpenStack Cyborg
Classification
- Weakness
-
- CWE-282 Improper Ownership Management
References
-
bugs.launchpad.net
/openstack-cyborg/+bug/2144056
web
-
openwall.com
/lists/oss-security/2026/05/07/6
web
-
security.openstack.org
/ossa/OSSA-2026-011.html
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-40214
advisory
-
github.com
/openstack/cyborg
package
-
pypi.org
/project/openstack-cyborg
package
-
github.com
/advisories/GHSA-mmpc-xjxr-5hf8
advisory
Sources
- CVE List CVE-2026-40214
- GitHub Advisory GHSA-mmpc-xjxr-5hf8
- NVD CVE-2026-40214
- OSV PYSEC-2026-2854
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.