CVE-2026-40213
High
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.
SeverityHigh
CVSS7.4
Exploit probability—
ProductOpenstack-cyborg
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- openstack-cyborg16.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openstack-cyborgPyPI | v < 16.0.1 | 16.0.1 |
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