So the Starliner's astronauts are currently stranded aboard the ISS as the Starliner is having issues. It had a small helium leak before launch, but Boeing and NASA determined this would not affect anything. However, turns out it had four additional helium leaks that were discovered after launch along with problems with five thrusters.
Sooooo...I've seen headlines that they're 'stranded' but they are all from more general web-based news sites that are basically repeating the same info. While there are helium leaks they are troubleshooting the issue and apparently want to make sure they try and figure out as much as they can while they are in space, because that part of the capsule isn't coming back to earth.
For better news reporting on spaceflight I've found https://spaceflightnow.com/ to be a pretty good resource, and just so happens that their top story right now is about this very subject. From the article:
In the meantime, Starliner commander Barry “Butch” Wilmore and co-pilot Sunita Williams are still cleared to undock and fly home at any time if a station malfunction or other issue crops up that requires a quick departure. As such, officials say they are not stranded in space....
...The issue for Starliner troubleshooters is that the helium leakage and the thrusters in question are located in the Starliner’s drum-shaped service module, which is attached to the base of the crew capsule. The service module is jettisoned prior to re-entry and burns up in the atmosphere.
Given that engineers will not be able to examine the actual hardware after the fact, NASA and Boeing managers want to give them as much time as possible to review telemetry, to continue testing and to polish contingency scenarios in case additional problems show up after undocking.