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.
Published: 2026-05-07
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-mm7j-mhhj-hj36 OpenStack Cyborg uses rule:allow (check_str='@') as the default policy for multiple API endpoints
History

Sun, 10 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Openstack
Openstack cyborg
Vendors & Products Openstack
Openstack cyborg

Fri, 08 May 2026 16:00:00 +0000

Type Values Removed Values Added
References

Fri, 08 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 00:15:00 +0000

Type Values Removed Values Added
Title Unrestricted API Access Enables Unauthorized FPGA Reprogramming in OpenStack Cyborg

Thu, 07 May 2026 22:15:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L'}


Subscriptions

Openstack Cyborg
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-08T15:47:07.733Z

Reserved: 2026-04-10T00:00:00.000Z

Link: CVE-2026-40213

cve-icon Vulnrichment

Updated: 2026-05-08T13:55:49.768Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-07T22:16:34.910

Modified: 2026-05-08T16:16:10.770

Link: CVE-2026-40213

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-10T21:26:32Z

Weaknesses