openstack-keystone: OpenStack Keystone: Unauthorized access and privilege escalation via AWS signature validation flaw

A flaw was found in OpenStack Keystone. This vulnerability allows an attacker to obtain a valid OpenStack's Keystone token, leading to access to unauthorized resources or privilege escalation within the OpenStack instance via sending a valid AWS Amazon Web Services signature to the /v3/ec2tokens ...

EUVD-2025-197772

OpenStack Keystone before 26.0.1, 27.0.0, and 28.0.0 allows a /v3/ec2tokens or /v3/s3tokens request with a valid AWS Signature to provide Keystone authorization...