this post was submitted on 24 Jul 2026
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Memes

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About half of lemmy today (lemmy.ml)
submitted 19 hours ago* (last edited 19 hours ago) by emergencyfood@sh.itjust.works to c/memes@lemmy.ml
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Tesseract is a web client for Lemmy that was found to be secretly and arbitrarily blocking users, communities and even entire instances. You can see if you're one of the kool kidz by running

curl -s https://tesseract.dubvee.org/tesseract/api/system/policy | base64 -d | gunzip > policy.json

and grepping your name / instance. Further details can be found in this post.

The poem above is adapted from Bertolt Brecht's The Burning of the Books, which can be read here. If you would rather read it in the original German, go here.

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[–] davel@lemmy.ml 7 points 15 hours ago* (last edited 4 hours ago) (1 children)

Edit to add: He’s put it back up again 🤷

Wow. Guess what existed yesterday but not today?

I was about to show how the repo version and the dubvee version of the obfuscated banlists are somewhat different from each other, but it’s no longer possible now that the repo has been deleted.

git diff --no-index \
    <(curl -sL https://github.com/asimons04/tesseract/raw/refs/heads/main/static/data/policy.dat \
        | base64 -d | gunzip | gron) \
    <(curl -sL https://tesseract.dubvee.org/tesseract/api/system/policy \
        | base64 -d | gunzip | gron)
[–] emergencyfood@sh.itjust.works 3 points 15 hours ago (1 children)

Interesting. I'm guessing the repo version is publicly viewable, but the dubvee version is the one actually implemented?

[–] davel@lemmy.ml 3 points 14 hours ago* (last edited 14 hours ago)

I couldn’t say. Perhaps the dubvee version was from an earlier git commit. There’s no way to know without a copy of the deleted repo. It might be deducible from @db0@lemmy.dbzer0.com’s fork, but it’s not worth the time & effort. https://github.com/db0/tesseract