CVE-2026-40213
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
10th
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.
| CWE | CWE-863 |
| Vendor | openstack |
| Product | cyborg |
| Published | May 7, 2026 |
| Last Updated | May 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low
Affected Versions
OpenStack / Cyborg
5.0.0 < 14.0.1 15.0.0 < 15.0.1 16.0.0 < 16.0.1