You're using <cfform>, right? When a <cfform> tag is processed by ColdFusion, it generates an HTML form, and a bunch of JS to make the special <cfform> functionality work. What you are seeing is completely normal for <cfform>, and it's always been there.
NB: you really should not be using <cfform>. Just use HTML and JS and do a proper job of it. <cfform> is a really substandard solution for form creation.
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Adam