Advisories for Gem/Agoo package

Agoo before 2.14.3 does not reject GraphQL fragment spreads that form cycles, leading to an application crash. NOTE: the vendor has disputed this on the grounds that it is not the server's responsibility to "enforce all the various ways a developer could write code with logic errors.

agoo allows request smuggling attacks where agoo is used as a backend with a frontend proxy that is also vulnerable. It is possible to conduct HTTP request smuggling attacks by sending the Content-Length header twice. Furthermore, invalid Transfer-Encoding headers were found to be parsed as valid which could be leveraged for TE:CL smuggling attacks.