CVE-2026-40213

HIGH

OpenStack Cyborg < 14.0.1, 15.0.0-15.0.1, 16.0.0-16.0.1 - Authenticated Incorrect Authorization via Default Policy Rule

Title source: llm

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.

References (3)

Core 3

Core References

https://bugs.launchpad.net/openstack-cyborg/+bug/2143263

https://www.openwall.com/lists/oss-security/2026/05/07/6

https://security.openstack.org/ossa/OSSA-2026-011.html

Scores

CVSS v3 7.4

EPSS 0.0004

EPSS Percentile 11.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-863

Status published

Products (4)

OpenStack/Cyborg 15.0.0 - 15.0.1

OpenStack/Cyborg 16.0.0 - 16.0.1

OpenStack/Cyborg 5.0.0 - 14.0.1

pypi/openstack-cyborg 0 - 16.0.1PyPI

Published May 07, 2026

Tracked Since May 08, 2026