Regarding impact description: deployments using UUID tokens are not affected, only those using PKI tokens (`keystone.conf [signing] token_format = PKI`).
`UUID` is the default format in stable/folsom and `PKI` is the default in stable/grizzly. In master, `token_format` is deprecated in favor of `keystone.conf [token] provider`.
Regarding impact description: deployments using UUID tokens are not affected, only those using PKI tokens (`keystone.conf [signing] token_format = PKI`).
`UUID` is the default format in stable/folsom and `PKI` is the default in stable/grizzly. In master, `token_format` is deprecated in favor of `keystone.conf [token] provider`.