dxbjavid opened a new pull request, #863:
URL: https://github.com/apache/httpcomponents-client/pull/863

   BearerScheme writes the token straight into the Authorization header, and 
unlike BasicScheme it never checks the credential for control characters. A 
bearer token carrying CR/LF is neutralised by the HTTP/1.1 line formatter, 
which replaces those bytes with spaces, but the HTTP/2 request converter passes 
header values through unchanged, so over h2 such a token can inject extra 
header material into the request. This applies the same control-character guard 
BasicScheme already uses, rejecting the token before the header is built.


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