CVE-2026-40213 HIGH

CVE-2026-40213

Vendor Openstack
Product Cyborg
Weakness CWE-863 · Incorrect authorization
Published May 7, 2026
Last update May 8, 2026

CVSS base score

7.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 7, 2026 CVE published
May 8, 2026 Record updated