The virtualenv tool creates isolated Python environments. The virtualenv tool is a successor to workingenv, and an extension of virtual-python. Security Fix: * python-urllib3: Cross-host redirect does not remove Authorization header allow for credential exposure * python-urllib3: CRLF injection due to not encoding the "\r\n" sequence leading to possible attack on internal service * python-requests: Redirect from HTTPS to HTTP does not remove Authorization header For more details about the security issue, including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.