Rule Definition
Too many temporary files can consume valuable storage space or overflow the number of temporary files because directories typically have limits on the number of files allowed. This could create a denial of service problem. Also, temporary files can be the source of sensitive information leakage.

Remediation
Delete temporary files once you no longer need them.

Violation Code Sample

Path tempFile = null;
try {
    // Create a temporary file
    tempFile = Files.createTempFile("example", ".tmp");   // VIOLATION

    // Perform operations on the temporary file
    System.out.println("Performing operations on the temporary file: " + tempFile.toAbsolutePath());

} catch (Exception e) {
    
}

Fixed Code Sample

Path tempFile = null;
try {
    // Create a temporary file
    tempFile = Files.createTempFile("example", ".tmp");

    // Perform operations on the temporary file
    System.out.println("Performing operations on the temporary file: " + tempFile.toAbsolutePath());

} catch (Exception e) {
    
} finally {
    // Explicitly delete the temporary file
    if (tempFile != null) {
        try {
            Files.delete(tempFile);    // FIXED
            System.out.println("Temporary file deleted successfully.");
        } catch (IOException e) {
            System.err.println("Failed to delete the temporary file: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

CWE-459: Incomplete Cleanup https://cwe.mitre.org/data/definitions/459.html