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Vulnerability record · CVE-2026-40213 · published 7 May 2026

CVE-2026-40213: Incorrect authorization vulnerability

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.

7.4 CVSS 3.1 High EPSS 0.33% · top 76.1% CWE-863 · Incorrect authorization Awaiting Analysis
7.4CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-40213), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.