CVE-2015-7546: Openstack Keystone

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

The identity service in OpenStack Identity (Keystone) before 2015.1.3 (Kilo) and 8.0.x before 8.0.2 (Liberty) and keystonemiddleware (formerly python-keystoneclient) before 1.5.4 (Kilo) and Liberty before 2.3.3 does not properly invalidate authorization tokens when using the PKI or PKIZ token providers, which allows remote authenticated users to bypass intended access restrictions and gain access to cloud resources by manipulating byte fields within a revoked token.

Affected products

• Openstack Keystone: from 8.0.0, before 8.0.2 (fixed in 8.0.2); from 2015.1.0, up to and including 2015.1.2
• Openstack Keystonemiddleware: from 1.5.0, up to and including 1.5.3; from 1.6.0, up to and including 2.3.2
• Oracle Solaris: version 11.3 only

Published 2016-02-03. Last modified 2026-06-17.