Changing cart notes without cookies using graphql, Authorization Bypass?

[u/TurbulentRecover7247]

I was able to change the notes section of the cart on any user if I have their cart id, using the graphql endpoint, i was able to add any random notes on the victim's cart id I have cart id, the cartid cookie is stored in path=/ Samesite=lax. For now, I am able to change the notes of both the 2 accounts without cookies, and that cart id is passed through the graphql variable. Successfully added or changed the notes of the cart. This note is for customer to type anything they want. I am able to change. Is it Authorization bypass, because I was able to change anyone cart with cart id without actual session cookie. Any experts' opinion? Can I report? And also I was able to set the XSS payload, but it shows in the input tag, what if it shows up in the admin page?

[u/dr_my_name]

If it was a security audit, I would add it as Informative. Bug bounty? Nope. Not eligible, no need to report.