There have been users spamming CSAM content in !lemmyshitpost@lemmy.world causing it to federate to other instances. If your instance is subscribed to this community, you should take action to rectify it immediately. I recommend performing a hard delete via command line on the server.
I deleted every image from the past 24 hours personally, using the following command: sudo find /srv/lemmy/example.com/volumes/pictrs/files -type f -ctime -1 -exec shred {} \;
Note: Your local jurisdiction may impose a duty to report or other obligations. Check with these, but always prioritize ensuring that the content does not continue to be served.
Update
Apparently the Lemmy Shitpost community is shut down as of now.
I got lucky. I am not subscribed to this community, and I am the only person on my instance. But what if I was subscribed and hadn't seen this post? This is too much responsibility for me.
I just shut down my instance until we can disable cached images. If that never happens, then I'm not bringing it back up.
Shout-out to https://github.com/wescode/lemmy_migrate. I moved my subscriptions over in a minute or two, and now, other than not having my post history, it's exactly the same.