Maintainers for build-essential are Matthias Klose <doko@debian.org>.
You may want to refer to the following individual bug pages: crossbuild-essential-amd64, crossbuild-essential-arm64, crossbuild-essential-armel, crossbuild-essential-armhf, crossbuild-essential-i386, crossbuild-essential-powerpc, crossbuild-essential-ppc64el, crossbuild-essential-s390x.
You might like to refer to the build-essential package page, or to the Package Tracking System.
If you find a bug not listed here, please report it.