CVE-2012-5571: Openstack Essex

Medium severity, CVSS 5.4. EPSS: 2.1% chance of exploitation in the next 30 days.

A flaw was found in OpenStack Keystone. This vulnerability allows remote authenticated users to bypass intended authorization restrictions. This occurs because OpenStack Keystone does not properly handle EC2 (Elastic Compute Cloud) tokens when a user's role has been removed from a tenant. An attacker can leverage a token associated with a removed user role to gain unauthorized access.

Affected products

• Openstack Essex: version 2012.1 only
• Openstack Folsom: version 2012.2 only

Published 2012-12-18. Last modified 2026-06-16.