# CVE-2026-40214: cyborg: In OpenStack Cyborg before 16.0.1, the Accelerator Request (ARQ) API does not enforce project ownership at any layer

CVE-2026-40214 is fixed in 6 products on 1 platform, first by cyborg-agent 14.0.0-3+deb13u1build0.25.10.1, released May 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-40214
- Priority: Routine
- CVSS: 6.3 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 7, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cyborg Debian 13.5 (trixie) | 14.0.0-3+deb13u1 | [DEBIAN-CVE-2026-40214](https://patchblox.com/security/data/fix/linux/debian-cve-2026-40214.md) | May 27, 2026 |
| Linux | cyborg Debian 14 | 16.0.0+git+2026.04.26.b8edfa06f1-1 | [DEBIAN-CVE-2026-40214](https://patchblox.com/security/data/fix/linux/debian-cve-2026-40214.md) | May 27, 2026 |
| Linux | cyborg-agent Ubuntu 25.10 (questing) | 14.0.0-3+deb13u1build0.25.10.1 | [cyborg-agent 14.0.0-3+deb13u1build0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-cyborg-agent-14.0.0-3-deb13u1build0.25.10.1.md) | May 7, 2026 |
| Linux | cyborg-agent Ubuntu 26.04.1 LTS (resolute) | 16.0.0-2ubuntu0.1 | [cyborg-agent 16.0.0-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-cyborg-agent-16.0.0-2ubuntu0.1.md) | May 7, 2026 |
| Linux | cyborg-api Ubuntu 25.10 (questing) | 14.0.0-3+deb13u1build0.25.10.1 | [cyborg-api 14.0.0-3+deb13u1build0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-cyborg-api-14.0.0-3-deb13u1build0.25.10.1.md) | May 7, 2026 |
| Linux | cyborg-api Ubuntu 26.04.1 LTS (resolute) | 16.0.0-2ubuntu0.1 | [cyborg-api 16.0.0-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-cyborg-api-16.0.0-2ubuntu0.1.md) | May 7, 2026 |
| Linux | cyborg-common Ubuntu 25.10 (questing) | 14.0.0-3+deb13u1build0.25.10.1 | [cyborg-common 14.0.0-3+deb13u1build0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-cyborg-common-14.0.0-3-deb13u1build0.25.10.1.md) | May 7, 2026 |
| Linux | cyborg-common Ubuntu 26.04.1 LTS (resolute) | 16.0.0-2ubuntu0.1 | [cyborg-common 16.0.0-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-cyborg-common-16.0.0-2ubuntu0.1.md) | May 7, 2026 |
| Linux | cyborg-conductor Ubuntu 25.10 (questing) | 14.0.0-3+deb13u1build0.25.10.1 | [cyborg-conductor 14.0.0-3+deb13u1build0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-cyborg-conductor-14.0.0-3-deb13u1build0.25.10.1.md) | May 7, 2026 |
| Linux | cyborg-conductor Ubuntu 26.04.1 LTS (resolute) | 16.0.0-2ubuntu0.1 | [cyborg-conductor 16.0.0-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-cyborg-conductor-16.0.0-2ubuntu0.1.md) | May 7, 2026 |
| Linux | python3-cyborg Ubuntu 25.10 (questing) | 14.0.0-3+deb13u1build0.25.10.1 | [python3-cyborg 14.0.0-3+deb13u1build0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-cyborg-14.0.0-3-deb13u1build0.25.10.1.md) | May 7, 2026 |
| Linux | python3-cyborg Ubuntu 26.04.1 LTS (resolute) | 16.0.0-2ubuntu0.1 | [python3-cyborg 16.0.0-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-cyborg-16.0.0-2ubuntu0.1.md) | May 7, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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