If you could provide a little more info it might be easier to narrow down.
Have you gotten water in your basement in the past? How frequently? Do you have a sump pump? Do you know how old the house is? Any recent new work going on that altered stormwater runoff patterns (new additon, patio, lawn grading, gutters etc)? Is the ground frozen? Is there any evidence of water running down a wall near the puddle?
In most cases the occasional puddle about this time of year is caused by heavy rain on frozen ground. The ground acts like a parking lot, the rain doesn't soak in. The ground next to your house is less frozen, so the rain that normally gets next to your house soaks in, plus whatever ponded water from adjoining areas that can drain to there will soak in there. So the soil along your foundation is now very saturated. Concrete is porous, and also has fine cracks, so water seeps through, especially if your house is older with no foundation damp-proofing or drain tile.
If you've been there a long time and haven't had seen water there before, it is most likely due to the above condition, and nothing to be too concerned about. Just monitor it. If it persists, or depending on your answers to the above questions, you may have more of a problem.