malicious URLs can cause git to send a stored credential to wrong server

git security advisory reports:

Git uses external “credential helper” programs to store and retrieve passwords or
other credentials from secure storage provided by the operating system. Specially-crafted
URLs that are considered illegal as of the recently published Git versions can cause Git
to send a “blank” pattern to helpers, missing hostname and protocol fields. Many helpers
will interpret this as matching any URL, and will return some unspecified stored password,
leaking the password to an attacker’s server.