[Webkit-unassigned] [Bug 213120] New: Cross-origin cookies aren't set in Safari on iOS/macOS and in WKWebView

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=213120

            Bug ID: 213120
           Summary: Cross-origin cookies aren't set in Safari on iOS/macOS
                    and in WKWebView
           Product: WebKit
           Version: Safari 13
          Hardware: All
                OS: All
            Status: NEW
          Severity: Major
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gprostmail at gmail.com

I'm not sure if that's a regression of https://bugs.webkit.org/show_bug.cgi?id=200857 and https://bugs.webkit.org/show_bug.cgi?id=204109 or not...
Cookies are just ignored and aren't sent in requests.

Works fine for cross-subdomain requests like between one.myhost.com and two.myhost.com but doesn't work between fully different domains like one.myhost.com and some.other.org.
BTW, I only checked that it doesn't work for sites that have different TLDs, not sure if the bug applies to sites with equal TLDs but different SLDs

I can reproduce it in Safari and Safari TP on macOS X 10.15.5 and in Safari and WKWebView on iOS 13.5.1

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