this post was submitted on 16 May 2026
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https://kb.synology.com/en-global/DSM/tutorial/Docker_container_cant_access_the_folder_or_file#x_anchor_idcd3f1170a3

Why allow "everyone" to have read write permission to shared folders in order to run container manager? Wouldn't this be insecure?

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[–] anamethatisnt@sopuli.xyz 3 points 2 hours ago* (last edited 1 hour ago)

The main thing I see you can avoid with locking down the docker images into a separate low permission user that can only access what they really need is if someone successfully attacks a project and you get infected with some shit when your Synology pulls image:latest.
It could limit the traversal of a ransomware that successfully breaks free of the container but ends up having no permissions outside as an example.
I would probably purge the whole NAS and setup from my backup for my own peace of mind even with the user separation though.

edit: updating "low user" to "low permission user", amazing how the brain can fill in words for you when reading your own texts.