What is CVE-2026-40213?

CVE-2026-40213 is a high-severity vulnerability in Openstack Cyborg, classified under Incorrect Authorization. CVSS score: 7.4/10. Published 2026-05-07.

How severe is CVE-2026-40213?

High severity. CVSS v3 base score is 7.4 out of 10.

Auth bypass in Openstack Cyborg

CVE-2026-40213

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…

Vulnerability class: Broken Access Control

EPSS: 0.000 (11.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.

Affected products

Openstack Cyborg — versions 5.0.0, 15.0.0, 16.0.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-40213?: CVE-2026-40213 is a high-severity vulnerability in Openstack Cyborg, classified under Incorrect Authorization. CVSS score: 7.4/10. Published 2026-05-07.
How severe is CVE-2026-40213?: High severity. CVSS v3 base score is 7.4 out of 10.