CVE-2026-40213

HIGH EPSS 10.8%

Published May 7, 20261mo ago · Modified Jun 17, 20261w ago

7.4 CVSS 3.1

High

Published May 7, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

7.4

Exploitability

3.1

Impact

3.7

Vector string

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

Threat Intelligence

EPSS Exploit Probability

10.8% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

References 3

bugs.launchpad.net https://bugs.launchpad.net/openstack-cyborg/+bug/2143263
security.openstack.org https://security.openstack.org/ossa/OSSA-2026-011.html
openwall.com https://www.openwall.com/lists/oss-security/2026/05/07/6

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.