OpenStack Keystone allows /v3/ec2tokens or /v3/s3tokens request with valid AWS Signature to provide Keystone authorization.
PyPI keystone · Upgrade to 28.0.0, 27.0.0 or 26.0.1 by release line · < 26.0.1; >= 27.0.0.0rc1, <= 27.0.0.0rc1; >= 28.0.0.0rc1, <= 28.0.0.0rc1 · CVE-2025-65073 · GHSA-hcqg-5g63-7j9h · amended