If you were to keep every toxic plant out of your Viv, you would have nothing but plastic and silk plants in your enclosure. Roughly 90% of all plants are toxic in some form. Toxicity is a plant's only defense mechanism. They can't run, they can't hide. The only thing they can do, is develop toxins so they won't be eaten. It's where a very large majority of our medications come from, the toxic substances from plants. Of course, scientists a lot smarter than I are able to refine these toxins into medications that are "safe" for humans. Keep in mind that very few plants secrete their toxins through the leaves.

That was the long answer, short answer, is your wandering Jew safe? Yes. I know many people who keep it in vivariums without issue.