There’s a non-zero chance for that. That’s why it’s vital to minimize the apps you’re sharing your nsec with.
Discussion
Will there be an option to destroy your original private key and transfer admin rights to a target key you’ve created with nsecBunker, nostr:npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft ?
That’s what a thought. Will look into best practice. Already got pointers from other nostriches