The Rust vs. JavaScript Undefined Behavior Crisis: Lessons from Recent Security Incidents and Cross-Language Compilation Bugs

Originally published on tamiz.pro.

The Silent Crisis: Undefined Behavior Across Language Boundaries

Recent high-profile security incidents have exposed a growing concern in the software engineering world: undefined behavior (UB) is not just a C/C++ problem anymore. From Rust compilation bugs to JavaScript engine vulnerabilities, developers are witnessing how subtle language design choices can lead to catastrophic failures when code crosses language boundaries or interacts with low-level systems.

These incidents aren't isolated — they represent a systemic issue affecting modern software stacks built on heterogeneous language ecosystems.

Case Study: The Rust Memory Safety Myth