Introducing the Threadiverse Catalog
I'm the maintainer of Catodon, which offers both microblogging and forums (Lemmy-compatible communities), and we noticed that discoverability is not the threadiverse's strongest point: Our server only showed forums/communities that it "knew" because someone from the server already followed them. In Reddit it's easy to see if there is a community for a subject you care about; on the Fediverse it's not that easy.
So I looked at what indexes there are, and most were focused in Lemmy - lemmyverse.net has added MBin and PieFed explorers, but I was looking for something that covers more platforms, and is a unified directory, rather than per-platform only. Maybe there is something that I missed, but I didn't find what I was looking for: a directory for the threadiverse. So I decided to build it.
The Threadiverse Catalog lists forums/communities from Catodon, Discourse, Friendica, Lemmy, Mbin, Mobilizon, NodeBB and PieFed. It hasn't been online for many days, so it hasn't indexed everything, but we already list over 20.000 forums/communities. If there are any bugs or other issues, please let me know.
We built this primarily for Catodon, and on our latest release (26.10.0 "Bongo Cat") users have access to its results through the in-app Search and Explore features, but it's open for everyone to use. It's open source and written in Go. Other projects are also welcome to use it.
Cheers =)
#threadiverse #fediverse #catodon #discourse #friendica #lemmy #mbin #mobilizon #nodebb #piefed
For reference, v4.15.0 was released 12 August 2026.
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Security Fixes
We receive many reports for vulnerabilities via our bug bounty program, and we encourage people to poke around and find vulnerabilities to report.
Note that as of today (1 September 2026), any reports compiled with the help of large language models are exempt from the bounty payment.
From v4.14.0 to v4.15.0 there were at least five security fixes shipped — we encourage all admins to update to the latest stable version at all times.
Instant voting
Voting on posts used to wait for the round-trip to complete. On high-volume instances this caused a bit of a delay between a vote and its response, so the front-end now just reflects the new vote without waiting for a confirmation from the backend.
Upload UI redesigned
" so purportedly, it looks nicer. Check it out 
ActivityPub updates
Chat privileges are now exposed for fediverse users. Existing sites should automatically grant this privilege to the fediverse user. If you want to restrict chat messages from remote users, disable this setting.
A couple of server-side improvements to the ActivityPub note/reply handlers so fewer database calls are made.
Queued topics now automatically pull for replies when accepted, without waiting for someone to enter the topic itself.
Added a configurable age cutoff for auto-categorization filters.
Activity Intents are now properly gated behind the global "activitypub enabled" switch.
