Slipping past a single non-recursive ../ strip with a nested ....// sequence to read a file outside the served directory
Sidestepping a capstone control-flow jailer by handing native-compile a filename instead of a lambda, so the byte compiler reads flag.txt as Lisp and names it in an undefined-variable warning
Escaping a Lua 5.5 bytecode sandbox by writing registers past the end of the stack, hijacking a table array pointer, and swapping global_State.frealloc for system