Hi,
New releases of both Node-RED 3.x and 4.x are available to address some upstream dependency security issues.
Check the links below for full details:
The 4.0.4 Docker images are already available. The 3.x images will be updated later today.
I was tempted to skip 4.0.4 and go straight to 4.0.5 just so people would say they couldn't find 4.0.4... but decided to keep the Nerdy Dad Joke to myself.