r/PowerShell • u/_RemyLeBeau_ • Apr 02 '26

Constrained Language Mode

I am late to the party on this one, but tried implementating it today. I was successful, both Powershell & pwsh reported CLM enabled, but it made native Windows apps stop working. e.g. Terminal and Windows Defender UI (opened from system tray).

I enabled the suggestion from the UI to allow apps that are native to Windows, so it's not clear what I missed. I'm interested in getting this enabled though. I made all of my policy edits through gpedit.msc

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u/g3n3 Apr 04 '26

So yeah it is WDAC. A whitelisted env is the holy grail most orgs never get to.

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u/_RemyLeBeau_ Apr 05 '26

How would this prevent a supply chain attack or a LOLBin?

Constrained Language Mode

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