Duplicates Cookies Are Being Added With An Extra Period Before A Subdomian

[o3-steven]

Current behavior

We upgraded to Cypress 12 recently and our tests started breaking. After running through some tests it seems that cypress 12 is adding a extra cookie with same site set to Lax but with a extra period before the subdomain.
For instance:
A cookie like this
TestCookie testsubdomain.testdomain.com

Will get another cookie like this if the cookie is set again
TestCookie .testsubdomain.testdomain.com

I can also confirm that all of these extra cookies have SameSite = lax even if the original cookie did not contain it.

If you downgrade to 11.2 this behavior goes away. I can confirm that no cookies with a leading period before the subdomain are created when running this outside of cypress

Looking through some of the tests around this behavior I tried to get it to happen by visiting the page twice - no luck. A redirect is also not needed for this to occur.

Running through some combinations this did work
Navigate to a page, set cookies, subdomain.domain.com/test
Navigate to another page, set cookies, subdomain.domain.com/test2

There should be a duplicated cookie.

Desired behavior

Cypress should only add one cookie.

Test code to reproduce

I don't have a reproducible copy mainly because of time concerns but I can circle back into this if someone doesn't have an easy way of getting this setup.

Cypress Version

12+

Node version

16.15.1

Operating System

Windows 10 Pro 19045.2546

Debug Logs

No response

Other

No response

[nagash77]

Hi @o3-steven , I believe this issue is a duplicate of #25174. I am going to close this issue as a duplicate. Please follow the other issue for updates.