Bug 226678 moved Timing-Allow-Origin checks to the network process on cocoa but did not do so for soup. It also added a number of web platform tests for Timing-Allow-Origin that fail on Linux. NetworkDataTaskSoup::continueHTTPRedirection() needs to add the checks as mentioned in the FIXME comment in that method.
Created attachment 431508 [details] Patch
Committed r278924 (238855@main): <https://commits.webkit.org/238855@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 431508 [details].
<rdar://problem/79384792>
Reopening to track the fix.
Created attachment 431639 [details] Patch
Committed r279032 (238952@main): <https://commits.webkit.org/238952@main>