Authorization Header Exposure in urllib3 Cross-Origin Redirects

CVE-2018-20060 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

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.

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