All Peertube instances have been updated to 8.1.7 which resolves the exploit.
federation has been re-enabled on all instances.

Due to the recent vulnerability discovered in the PeerTube software,
we have temporarily disabled federation on our instances while we deploy the v8.1.8 security patch later this week. Federation will be re-activated once the patch is live.

Thank you for your understanding.

More context:
https://github.com/Chocobozzz/PeerTube/releases/tag/v8.1.8