urllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Urllib3 | Python | * | 1.23 (excluding) |