CWE-668 (将资源暴露给错误范围) — Vulnerability Class 129

CWE-668 represents a critical access control weakness where software inadvertently exposes sensitive resources, such as files or directories, to unauthorized actors outside their intended security boundary. This vulnerability typically arises from misconfigured permissions, logic errors that target the wrong object, or flawed trust assumptions between different system spheres. Attackers exploit these flaws by leveraging improper access rights to read, modify, or delete protected data, often bypassing intended isolation mechanisms. To mitigate this risk, developers must enforce strict least-privilege principles, ensuring resources are accessible only to the specific processes or users requiring them. Implementing robust access control lists, validating object references before operations, and conducting thorough code reviews for permission settings are essential practices. By rigorously defining and enforcing security boundaries, organizations can prevent unintended data exposure and maintain the integrity of their system architecture against sphere-crossing attacks.