No, Boeing Starliner's NASA astronauts are not stranded in space. Here's why.

Boeing Starliner's two astronauts knew to expect the unexpected when they took off on the spacecraft's first crewed mission on June 5. I learned this back in March, when NASA hosted reporters at the agency's Johnson Space Center (JSC) in Houston for two days. We used four Starliner simulators, spoke at length with senior agency and Boeing leadership, and sat down with NASA astronauts Butch Wilmore and Suni Williams. More

(Source: Space.com - Aug 2)