[nimrody]

Well.. that's exactly what happened to Solarwinds last year, didn't it?

Actually smarter than that - they got into the build system and added the malicious code in the build process so you couldn't see it in the repository.

Do you think it's that difficult for a state sponsored body to infiltrate into a commercial company?

[Melio]

The effort my big software company does on regards of requirements of releasing software, I would say yes.

Big companies like Nvidia have background checks, independent security teams etc.

Impossible? No. But easier and cheaper is still other means.