Leaky injector line?

Pics attached.

Just discovered this. Seems to be leaking from where the little curved metal pipe goes into the engine. Seems to be leaking diesel, slowly.

Is this something I can fix myself without taking off the top of the engine? (I do a buncha repairs on the truck but I haven't really ever touched the engine)

Is this something that needs to be fixed urgently (risk of imminent failure, risk of fire, etc), or can I wait on it for a couple of weeks?

 

That's kind of what I figured. I had these done before back in 2019 and it seemed pretty easy when the mechanic did it. Kinda sucks they're leaking again tho.

What would you call that job? Injector line seal replacement, or something like that? I want to look up youtubes how to do it, but I don't know what to search for lol