Credit Card AutoFill Crashes WebKit Process on Safari 26.0.1

After updating to Safari 26.0.1 on macOS Sonoma 14.8.1, any attempt to autofill a form with a saved credit card will cause the WebKit process to crash. This happens as soon as AutoFill has been authorized via Touch ID or manual password entry. The web page then instantly reloads with the dreaded “This webpage was reloaded because a problem occurred.” banner along the top.

This logging in Console.app seems relevant:

Warning: Exception caught during handling of received message, marking message invalid .
Exception: +[WBSFormDataController getCreditCardControlValuesForFillingInWebView:originatingInFrame:forForm:withMetadataProvider:andCreditCardData:completionHandler:]: unrecognized selector sent to class 0x1f3ba0b70
Received an invalid message 'RemoteObjectRegistry_CallReplyBlock' from the WebContent process with PID 55975
AuxiliaryProcessProxy::terminate: PID=55975
0x1114dc240 - ProcessAssertion::acquireSync Trying to take RBS assertion 'XPCConnectionTerminationWatchdog' for process with PID=55975
0x111c98b80 - [PID=55975] WebProcessProxy::didClose: (web process 55975 crash)