Noodles — Food safety facts
Safe to share · Cats · full breakdown on the linked food page
Plain boiled noodles are safe. Instant noodles are not — the seasoning has onion and garlic.
Short answer
No, there is no toxic danger; plain boiled noodles are safe for cats. Occasionally a cat may experience mild stomach upset if it eats a large amount, which usually appears within a few hours and resolves within a day. Offer only a small bite and watch for vomiting, loose stools, or loss of appetite. If any gastrointestinal signs persist beyond 24 hours, reach out to your veterinarian.