CWE-241 (非预期数据类型处理不恰当) — Vulnerability Class 30

CWE-241 represents a critical input validation weakness where software fails to properly manage unexpected data types, such as receiving a character when a numeric value is anticipated. Attackers typically exploit this vulnerability by injecting malformed or type-mismatched data into application inputs, potentially triggering unhandled exceptions, logic errors, or unexpected system states that can lead to denial of service or further code execution. To mitigate this risk, developers must implement rigorous input validation mechanisms that strictly enforce expected data types before processing. This includes using robust parsing libraries, implementing explicit type checking, and applying defensive programming practices that gracefully handle or reject anomalous inputs. By ensuring the application only accepts data conforming to predefined schemas, organizations can prevent type confusion attacks and maintain system integrity against malformed data exploitation.