GHSA-Q7P4-7XJV-J3WF Fabio allows HTTP clients to manipulate custom headers it adds

Summary Fabio allows clients to remove X-Forwarded headers except X-Forwarded-For due to a vulnerability in how it processes hop-by-hop headers. Fabio adds HTTP headers like X-Forwarded-Host and X-Forwarded-Port when routing requests to backend applications. Since the receiving application should...