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Two leaks detected on International Space Station, Russian space agency says - Finance news and analysis from Global Banking & Finance Review
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Two leaks detected on International Space Station, Russian space agency says

Published by Global Banking & Finance Review

Posted on June 5, 2026

1 min read

· Last updated: June 5, 2026

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Roscosmos Reports Detection of Two Leaks on International Space Station

Details of the ISS Leak Incident

MOSCOW, June 5 (Reuters) - Russian state space agency Roscosmos said on Friday that its experts had detected two leaks aboard the International Space Station (ISS) but that there was no immediate threat to the crew.

Detection of the Leaks

"When the transition chamber compartment of the Zvezda module was pressurised... specialists from the main operational control group for the Russian segment of the ISS detected a leak from the spacecraft," Roscosmos said in a statement.

First Leak: Location and Resolution

The first leak was fixed with a hermetic compound while preparations are underway to seal the second leak which is located on the conical part of the transition chamber compartment, Roscosmos said.

Crew Safety and ISS Status

"The situation does not threaten the safety of the crew and onboard systems - the pressure on board the ISS is stable and maintained at the calculated level," Roscosmos said.

(Reporting by Reuters; Writing by Guy FaulconbridgeEditing by Andrew Osborn)

Key Takeaways

  • The leaks are located in the Russian segment’s Zvezda service module, specifically the transition (transfer) chamber—this area has been a persistent source of slow leaks since September 2019 (en.wikipedia.org).
  • Various repair attempts—including using sealing compounds and partial isolation of the chamber—have reduced leak rates but not fully eliminated the issue; in mid‑2025 Roscosmos reported the leak was sealed, though later monitoring indicated minor continued leakage (www1.ru).
  • NASA and Roscosmos disagree on root causes and structural risk: NASA classifies the situation as a high‑risk “5×5” problem and continues precautionary protocols, while Roscosmos maintains confidence in managing it without closing the hatch permanently (arstechnica.com).

References

Frequently Asked Questions

How many leaks were detected on the International Space Station?
Roscosmos reported that two leaks were detected on the International Space Station.
Is there any immediate threat to the ISS crew due to these leaks?
According to Roscosmos, there is no immediate threat to the crew or onboard systems.
Where were the leaks detected aboard the ISS?
The leaks were found in the transition chamber compartment of the Zvezda module.
How was the first leak fixed on the ISS?
The first leak was fixed using a hermetic compound.
What measures are being taken for the second leak on the ISS?
Preparations are underway to seal the second leak, which is located on the conical part of the transition chamber.

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