It’s true!
According to this article from Popular Science, astronauts have reported that space smells like burnt or fried steak. The smell has also been likened to burning metal and spent gunpowder. The smell is due to polycyclic aromatic hydrocarbons (PAHs) — molecules that are created by burning organic material. PAHs are not only found in space. They’re here on Earth in our air, water, soil and food… even in that charred ribeye.