Nasa's Crew Alert Reveals Serious Leak Concerns on ISS

WHO:

Gizmodo - Russian cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev were involved in the repair efforts.

Gizmodo - NASA astronauts Jessica Meir, Jack Hathaway, Chris Williams, and European Space Agency’s Sophie Adenot were part of the crew ordered to shelter.

Hackaday - NASA Press Secretary Bethany Stevens commented on the situation.

WHAT:

Gizmodo - NASA issued a Crew Safety Alert due to a serious air leak on the ISS.

Gizmodo - The air leak rate increased from one pound of air per day to two pounds.

Gizmodo - NASA ordered five crew members to shelter in the SpaceX Dragon spacecraft.

Gizmodo - Roscosmos planned to cut a bracket to access a suspected leak area but later paused the effort.

Hackaday - NASA's Safe Haven procedure was activated due to elevated risk of damage to the ISS.

WHERE:

Gizmodo - The leak was traced to the vestibule (PrK) connecting a docking port to the Russian Zvezda module on the ISS.

WHEN:

Gizmodo - The initial report of the leak by Roscosmos occurred in September 2019.

Gizmodo - The Crew Safety Alert was issued on Friday, June 5.

WHY:

Gizmodo - The air leak has persisted and worsened over nearly seven years, prompting urgent repair efforts.

HOW:

Gizmodo - Roscosmos proposed using a saw to access the area contributing to the leak.

Gizmodo - NASA mission control ordered the crew to shelter in the Dragon spacecraft as a precautionary measure.

(UPDATED June 10, 2026 04:23 UTC)

NASA has issued a Crew Safety Alert due to a serious air leak on the International Space Station, which has worsened over nearly seven years, increasing from one pound of air lost per day to two pounds. In response, five crew members, including NASA astronauts Jessica Meir, Jack Hathaway, Chris Williams, and European Space Agency’s Sophie Adenot, were ordered to shelter in the SpaceX Dragon spacecraft while Russian cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev began repair efforts. NASA's Safe Haven procedure was activated, and Roscosmos planned to cut a bracket to access the suspected leak area in the vestibule connecting a docking port to the Russian Zvezda module, but later paused those efforts.