Malicious Code Hidden in Build Config Files Exploits Trust in PRs: Enhanced Scrutiny and Automated Checks Proposed

Introduction: The Hidden Threat in Build Configs Imagine a burglar slipping past security not by picking the lock, but by hiding in the delivery truck. That’s the essence of this emerging attack vector. Attackers are exploiting a blind spot in the software development lifecycle: build configuration files . These files, like next.config.mjs or vue.config.js , are rarely scrutinized during pull request (PR) reviews. GitHub’s UI compounds the problem by scrolling them off-screen, effectively hiding them in plain sight. The result? Malicious code slips through, wrapped in the veneer of a legitimate PR from a compromised contributor. The Attack Mechanism: A Three-Stage Obfuscation Here’s how it works, step by step: Injection: The attacker inserts obfuscated malicious code into a build configuration file. This code is designed to evade casual inspection. For example, it might be buried within a long, minified JavaScript block or disguised as a harmless configuration option. Payload Delivery: