What is CVE-2026-66139?

CVE-2026-66139 is a medium-severity vulnerability in Openstack Zaqar, classified under Missing Authentication for Critical Function. CVSS score: 4.8/10. Published 2026-07-24.

How severe is CVE-2026-66139?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Auth bypass in Openstack Zaqar

CVE-2026-66139

OpenStack Zaqar through 22.0.0 allows authentication bypass via an EXTRA-SPEC header when a UUID is known.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L.

Affected products

Openstack Zaqar — versions 12.0.0, 21.0.0, 22.0.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-66139?: CVE-2026-66139 is a medium-severity vulnerability in Openstack Zaqar, classified under Missing Authentication for Critical Function. CVSS score: 4.8/10. Published 2026-07-24.
How severe is CVE-2026-66139?: Medium severity. CVSS v3 base score is 4.8 out of 10.