Russian cosmonaut Oleg Artemyev, one of the country’s most experienced spaceflyers, was abruptly removed from SpaceX’s Crew-12 mission to the International Space Station. While Russia’s space agency claims he was reassigned to a different job, reporting from The Insider says the real reason is more serious: Artemyev allegedly photographed sensitive SpaceX materials during training in California, triggering an investigation into potential violations of U.S. national security laws, including ITAR.

What happened to Oleg Artemyev’s 2026 ISS assignment?

Oleg Artemyev, a veteran Russian cosmonaut with more than 560 days in space, was expected to launch aboard SpaceX’s Crew-12 mission to the International Space Station in February 2026. Then, without warning, Roscosmos replaced him with fellow cosmonaut Andrei Fedyayev.

The official explanation? A vague, one-line statement claiming Artemyev had been “transferred to another job.” But independent digs tell a different story.

According to Russian investigative outlet The Insider, Artemyev’s removal came after U.S. officials concluded he violated International Traffic in Arms Regulations (ITAR)—a set of U.S. laws governing the handling of sensitive aerospace and defense-related technical data. ITAR violations are serious; they’re often tied to national security breaches and can carry heavy criminal penalties.

Where the alleged breach occurred

A launch analyst and a well-known Russian spaceflight Telegram channel both reported that the incident happened at SpaceX headquarters in Hawthorne, California, during Crew-12 preflight training. Artemyev allegedly:

• Took photos of SpaceX engines and documents
• Exported that material using his personal smartphone

If true, that’s a direct ITAR violation. And it would explain why NASA and SpaceX moved quickly to block him from the mission.

Why ITAR matters—and why SpaceX is extremely strict about it

ITAR restricts the sharing of defense-related or dual-use technologies with foreign nationals. That includes systems like

• Rocket engines
• Launch vehicle designs
• Propulsion and guidance systems
• Technical training materials

SpaceX, which serves both NASA and the U.S. Department of Defense, is particularly cautious about ITAR compliance. Even unintentional leaks can be treated as major violations.

For foreign astronauts, including Russian ISS crew members, their access to certain training materials is already tightly controlled. This is especially true amid heightened U.S.–Russia tensions.

Any breach, even a small one, can result in an astronaut being barred from a mission. Removing someone just two months before launch is highly unusual, and analysts say it’s a sign that the violation was taken very seriously.

What are sources inside Russia saying?

A launch analyst named Gregory Trishkin, cited by The Insider, confirmed that his contacts told him an “interdepartmental investigation” is already underway in Russia. He added:

• Removing a crew member this close to launch is “an indirect sign” that something significant occurred.
• “It’s very difficult to imagine an experienced cosmonaut inadvertently committing such a gross violation.”

A popular Russian spaceflight Telegram channel, “Yura, Forgive Me!,” reported that the alleged incident occurred the week prior and involved taking photos of engines and other sensitive hardware.

Roscosmos, in contrast, has not acknowledged any wrongdoing.

Who is Oleg Artemyev—and why this case stands out

Artemyev is not a rookie. He’s one of Russia’s most trusted and experienced space travelers.

• ISS Expedition 39/40 (2014)
• ISS Expedition 55/56 (2018)
• ISS Expedition 66/67 (2022)

Across those missions, he spent 560 total days in orbit—a milestone few astronauts worldwide have reached.

Because of his experience, experts say it’s unlikely the alleged breach was accidental. Cosmonauts undergo extensive training on security protocols when working with international partners.

His removal sends a message: no one, no matter how senior, is exempt from ITAR compliance.

What the shake-up means for Crew-12 and NASA–Russia cooperation

Crew-12 is a four-person mission under NASA’s Commercial Crew Program. Even as U.S.–Russia relations deteriorate, NASA continues to swap seats with Roscosmos to preserve joint ISS operations.

Replacing a cosmonaut this late can complicate training schedules. And if Artemyev is found to have intentionally recorded restricted materials, it could:

• Tighten U.S. security procedures for foreign astronauts
• Lead to reduced access for Roscosmos crew during SpaceX and NASA training
• Add new friction to an already fragile U.S.–Russia ISS partnership

This comes at a delicate moment. Russia has repeatedly floated the idea of withdrawing from the ISS in the coming years, and analysts say security disputes like this won’t help.

Why this story matters beyond one cosmonaut

This isn’t just a personnel change. It’s a case study in what happens when geopolitics, private spaceflight, and national-security law collide.

A few key takeaways for readers:

• NASA and SpaceX are now operating in a much more sensitive environment—with foreign crew members on U.S. spacecraft.
• ITAR enforcement is tightening, especially as commercial space companies become key players in national defense.
• Incidents like this will define how international cooperation in orbit works in the 2030s, especially as the ISS nears retirement and new stations—public and private—take shape.

For SpaceX, the security of its technology is non-negotiable. For NASA, stable ISS staffing is essential. For Roscosmos, maintaining a presence on U.S. spacecraft remains politically important.

Artemyev’s removal sits at the intersection of all three priorities.