When posting a message on talk, a reference is fetched for any link in the message
There is a hardcoded mandatory 10sec timeout. But the ressource is still fetched for those entire 10 seconds.
For high-bandwidth servers, this can result in disk space being temporarily filled and saturate the server bandwidth.
Tested on my 2.5gbps network, I was easily able to find 10GB ressources online that have higher network speed and fully saturate the netwrok for a few seconds and a few messages.
Can severly impact server performances and/or lead to a denial of service