An undercover officer with a cocaine addiction infiltrates a gang of drug runners, and a blood bath ensues when a heist goes wrong and a rival cartel hunts them down for revenge.

Perhaps for realistic stories such as this, but even then, I disagree. There is/will be a character in someone's mind that is unlike any other, there is some plot twist that has never been seen before. That's not even including all of the fantasy/sci-fi worlds that have yet to be.
Given how many cops show/films there have been, it does need to have an extremely familiar(such as NCIS, which could create even?more spin-offs, with each only being slightly different) premise or it just needs something unique. This idea has potential, yes, but based solely on the logline, it has nothing that would drive me to see it, unless perhaps I was just really craving another cop show.

I agree that are only so many basic dramatic situations or plot templates. ?George Polti drew up and published a catalogue of 36 dramatic situations in 1924. To which have been added a 2 or 3 more, like the mocumentary.

So the challenge in a ?logline is to indicate a new variation, a unique execution on a familiar plot template. ? Which I don't see in this logline.

(Hamlet and the Lion King ?although they converge on a similar plot template [#4 on Polti's list, Vengeance taken upon kindred for kindred] radically diverge in terms of characters, setting, complications, dilemmas and outcome.)

Don't wish to attack my fellow reviewers. But there is nothing unique, it's all in the execution. Lion King and Hamlet are the same story.

Taking part in a drug hiest that turns into a massacre a drug addicted undercover cop is being hunted by the cartel out to get revenge.

It does cover the inciting incident but not his goals or how the story unfolds. Which is the execution.