GHSA-F524-RF33-2JJR OPA Compiler: Bypass of WithUnsafeBuiltins using "with" keyword to mock functions

Impact The Rego compiler provides a deprecated WithUnsafeBuiltins function, which allows users to provide a set of built-in functions that should be deemed unsafe — and as such rejected — by the compiler if encountered in the policy compilation stage. A bypass of this protection has been found,...