Can confirm on arch linux, latest steam version at this moment.
Additional note: this process was also using over 7 cores of cpu (ryzen 5 3600)

I'm noticing the same issue
My install is Ubuntu 22.04
steamwebhelper has a memory leak that grows if you don't do anything in the store, also when the steam window is closed to tray icon
Highest I've reen it go is 18 gig of ram
once you refresh the store page, memory usage goes back to normal, until you don't do anything for a while..
Nothing extracted yet.
Your system information
Please describe your issue in as much detail as possible:
Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist
One steamwewbhelper process ate all RAM
Steps for reproducing this issue: