The leak, which is thought to be the result of a micrometeoroid, is described as not being life threatening.
According to NASA, all station systems are stable and the crew is planning to return to its regular work schedule today, August 31, 2018.
The hole appears to have been caused by either space junk or a small meteorite colliding with the station.
Because the pressure loss was "very small", flight controllers determined that the astronauts and cosmonauts "are in no danger", officials with the European Space Agency (ESA) said in a separate statement. Additional updates will be posted on NASA's International Space Station blog as more information becomes available, NASA spokesperson Dan Huot told Space.com in an email.
NASA tweeted, "The @Space_Station crew is conducting troubleshooting and fix work today after the discovery of a tiny leak last night traced to the Russian segment of the orbital complex".
[H]ardOCP: Air Leak Found in International Space Station
None at all - the ground controllers actually found the leak about 7pm space time and made a decision to let the crew sleep first. It turned out that PROTEK docked with the space station Russian spacecraft Soyuz MS-09, reports the press service of NASA .
Russian Federation has been transporting USA astronauts to the orbiting station since the United States halted its space shuttle program seven years ago. Flight controllers had been monitoring the small drop in pressure overnight, deciding to let the crew sleep as the hole presented no danger.
A long-term solution is being worked on and when complete, the crew will look for any further leaks.
'Flight controllers are working with the crew to develop a more comprehensive long-term fix'.
The astronauts, commander Drew Feustel, flight engineers Ricky Arnold and Serena Auñón-Chancellor, Alexander Gerst, Oleg Artemyev and Sergey Prokopyev eventually located the source of the leak: The Soyuz MS-09 spacecraft.
Theship docked at the orbiting lab in June.
NASA also stated that the hole was found in the upper spherical section of the capsule, a part that doesn't return to Earth, which means good news for the astronauts that count on the capsule to get back home.