wac commit 385e1 was discovered to contain a heap overflow via the load_module function at /wac-asan/wa.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted wasm file.
https://github.com/kanaka/wac/issues/18
https://gist.github.com/haruki3hhh/8b9e1922083abef33a9024017eb2b9fe