query_params.cpp in cxxtools before 2.2.1 allows remote attackers to cause a denial of service (infinite recursion and crash) via an HTTP query that contains %% (double percent) characters.

framework/common/messageheaderparser.cpp in Tntnet before 2.2.1 allows remote attackers to obtain sensitive information via a header that ends in \n instead of \r\n, which prevents a null terminator from being added and causes Tntnet to include headers from other requests.