Improper Input Validation
httplib2 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, after an initial connection is made. This allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
CWE-20 - Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.