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.

High
CVSS
7.4
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0021
10th percentile

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

ProductFixed inFixReleased
Linux
cyborg · Debian 13.5 (trixie) 14.0.0-3+deb13u1 DEBIAN-CVE-2026-40213 May 27, 2026
cyborg · Debian 14 16.0.0+git+2026.04.26.b8edfa06f1-1 DEBIAN-CVE-2026-40213 May 27, 2026
cyborg-agent · Ubuntu 25.10 (questing) 14.0.0-3+deb13u1build0.25.10.1 cyborg-agent 14.0.0-3+deb13u1build0.25.10.1 May 7, 2026
cyborg-agent · Ubuntu 26.04.1 LTS (resolute) 16.0.0-2ubuntu0.1 cyborg-agent 16.0.0-2ubuntu0.1 May 7, 2026
cyborg-api · Ubuntu 25.10 (questing) 14.0.0-3+deb13u1build0.25.10.1 cyborg-api 14.0.0-3+deb13u1build0.25.10.1 May 7, 2026
cyborg-api · Ubuntu 26.04.1 LTS (resolute) 16.0.0-2ubuntu0.1 cyborg-api 16.0.0-2ubuntu0.1 May 7, 2026
cyborg-common · Ubuntu 25.10 (questing) 14.0.0-3+deb13u1build0.25.10.1 cyborg-common 14.0.0-3+deb13u1build0.25.10.1 May 7, 2026
cyborg-common · Ubuntu 26.04.1 LTS (resolute) 16.0.0-2ubuntu0.1 cyborg-common 16.0.0-2ubuntu0.1 May 7, 2026
cyborg-conductor · Ubuntu 25.10 (questing) 14.0.0-3+deb13u1build0.25.10.1 cyborg-conductor 14.0.0-3+deb13u1build0.25.10.1 May 7, 2026
cyborg-conductor · Ubuntu 26.04.1 LTS (resolute) 16.0.0-2ubuntu0.1 cyborg-conductor 16.0.0-2ubuntu0.1 May 7, 2026
python3-cyborg · Ubuntu 25.10 (questing) 14.0.0-3+deb13u1build0.25.10.1 python3-cyborg 14.0.0-3+deb13u1build0.25.10.1 May 7, 2026
python3-cyborg · Ubuntu 26.04.1 LTS (resolute) 16.0.0-2ubuntu0.1 python3-cyborg 16.0.0-2ubuntu0.1 May 7, 2026

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