Hi folks, This is a heads up that I'm planning to deprecate non-ASCII characters in cookie domain attributes in Chromium, meaning that these cookies will be rejected going forward. See https://groups.google.com/a/chromium.org/g/blink-dev/c/x3DY-PuZhNw for all details. This is following a discussion in the HTTP WG <https://github.com/httpwg/http-extensions/issues/1707> and subsequent specification <https://github.com/httpwg/http-extensions/pull/1969> in RFC 6265bis. While John Wilander from Apple was part of the discussion, I'd still like to extend the request to this list to give feedback on the proposal.

From my understanding, for Safari, this is handled in the OS network stack instead of WebKit, and I believe the internal bug on your side to be rdar://88349235

As both Chromium and Safari currently accept these cookies, there is a potential for breakage. However, in Chrome, usage appears to be low enough to move forward with deprecation and removal, see the linked thread above. Thanks! Johann