CWE-526 (通过环境变量导致的信息暴露) — Vulnerability Class 19

CWE-526 represents a critical data exposure weakness where applications store unencrypted sensitive information, such as credentials or tokens, within environment variables. This vulnerability is typically exploited by attackers who gain access to the system’s execution context, allowing them to read these variables directly. Since environment variables are often inherited by child processes, spawned dependencies, or cloud-based serverless functions, the data becomes accessible to multiple components that may not require such privileged access. Additionally, these values can inadvertently leak into logs, headers, or diagnostic messages. To mitigate this risk, developers must avoid placing secrets in environment variables entirely. Instead, they should utilize dedicated, encrypted secret management solutions or hardware security modules that ensure sensitive data remains protected at rest and in transit, limiting access strictly to authorized processes.