[Webkit-unassigned] [Bug 196375] Safari (still) doesn't send Lax cookies after a cross-site redirection

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196375

--- Comment #20 from Chris Dumez <cdumez at apple.com> ---
(In reply to Chris Dumez from comment #19)
> (In reply to Flávio Juvenal (fjsj) from comment #18)
> > Created attachment 366289 [details]
> > iOS 12.2 in-app Safari Lax cookies issue
> > 
> > Chris, I've attached a video with the reproduction for the iOS-only problem.
> > It only happens on GMail with in-app Safari browser.
> > 
> > I know that cookies aren't shared between Safari and GMail's webview, but
> > the issue is that the webview doesn't seem to be able to set any Lax cookies.
> > 
> > The video above tests the site
> > https://safari-samesite-issue.herokuapp.com/target/
> > which uses Lax cookies. Test with that link, it won't work. Afterwards, test
> > with https://safari-issue-samesite-no-lax.herokuapp.com/target/, which
> > doesn't use Lax cookies. It'll work.
> 
> I need to try with the Gmail app, I had tried with Gmail.com in MobileSafari
> earlier.

Ok, I was able to reproduce the issue on iOS 12.2 using the Gmail app. I have confirmed that r241900 fails and r241920 works. It is therefore extremely likely that this was fixed by https://trac.webkit.org/changeset/241918/webkit and that the iOS issue you're seeing is a dupe of bug 194906 as well.

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