CVE-2020-12691: Canonical Ubuntu Linux

High severity, CVSS 8.8. EPSS: 4.9% chance of exploitation in the next 30 days.

An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any authenticated user can create an EC2 credential for themselves for a project that they have a specified role on, and then perform an update to the credential user and project, allowing them to masquerade as another user. This potentially allows a malicious user to act as the admin on a project another user has the admin role on, which can effectively grant that user global admin privileges.

Affected products

• Canonical Ubuntu Linux: version 18.04 only
• Openstack Keystone: before 15.0.1 (fixed in 15.0.1); version 16.0.0 only

Published 2020-05-07. Last modified 2026-06-17.