CVE-2026-66139: Openstack Zaqar

Medium severity, CVSS 4.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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

Affected products

• Openstack Zaqar: from 12.0.0, before 20.1.1 (fixed in 20.1.1); version 21.0.0 only; version 22.0.0 only

Published 2026-07-24. Last modified 2026-07-30.