.NET Framework 4.8 support is coming to App Service.
Public Azure cloud deployment will begin in mid-late July 2020 completing by mid-September 2020. For our Sovereign clouds, deployment will begin by mid-late August 2020 and complete by early-October 2020.
We will update this item periodically to inform you of the deployment progress.
An error occurred while saving the commentDuane Gibbs commented
We're also experiencing this issue. Our web app is loading System.Web.dll from the following location in GAC:
When downloaded via Kudu and decompiled I can see that this is an older version which does not contain the SameSite cookies patch.
The patch is working perfectly under local IIS so it seems it may not have been rolled out yet or rolled out incorrectly? Can we get an update on this please? As already mentioned, Chrome is rolling out SameSite Lax by default at the end of the month which will fundamentally break our web app if we cannot apply this patch.