# CVE-2026-40213: cyborg: OpenStack Cyborg before 16.0.1 uses rule:allow (check_str='@') as the default policy for multiple API endpoints

CVE-2026-40213 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: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-40213
- Priority: High
- CVSS: 7.4 (high)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 7, 2026

## Description

OpenStack Cyborg before 16.0.1 uses rule:allow (check_str='@') as the default policy for multiple API endpoints. This unconditionally authorizes any request carrying a valid Keystone token regardless of roles, project membership, or scope. An authenticated user with zero role assignments can complete various actions such as reprogramming FPGA bitstreams on arbitrary compute nodes via agent RPC.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cyborg Debian 13.5 (trixie) | 14.0.0-3+deb13u1 | [DEBIAN-CVE-2026-40213](https://patchblox.com/security/data/fix/linux/debian-cve-2026-40213.md) | May 27, 2026 |
| Linux | cyborg Debian 14 | 16.0.0+git+2026.04.26.b8edfa06f1-1 | [DEBIAN-CVE-2026-40213](https://patchblox.com/security/data/fix/linux/debian-cve-2026-40213.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 2026-11-08T19:12:23Z 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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