CVE 2010-1940

Apple Safari 4.0.5 on Windows sends the "Authorization: Basic" header appropriate for one web site to a different web site named in a Location header received from the first site, which allows remote web servers to obtain sensitive information by logging HTTP requests. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

See the CVE page on Mitre.org for more details.