I feel this question may be a bit broad so to narrow I'm looking for something supported by the DM Guide or PHB. There are random tables for just about everything, but I did not see one for curse effects.
I did see scroll and potion mishaps DMG 140 and the quirk table GMD 143 which I suppose I could use or just apply random status conditions from the PHB appendix. But I was hoping for something more official.
Also I imagine two types of tables. A curse that has one continuous effect and a curse that has a sort of random effect every day or week.
What does the PHB or DMG offer in terms of types of curses?
Best Answer
Options from 5th Edition
Options from Earlier Editions
Since these types of effects tend to be more edition agnostic than other rules, you might want to consider earlier sources. Dragon Magazine would often run an article on new ways to curse a player.
While it's not entirely related, here is a fun article on ways players can use cursed items to their advantage: "Putting Evil To Good Use" by Jonathan M. Richards in Dragon 215 pg 10
I am sure there are many more sources out there, so I encourage you to keep exploring.
General Suggestion
Rolling randomly is OK if it is a scroll / potion / trap, or even a magical mishap. But you might want to consider tying the curse to to the theme of the item when the item is more significant. Look in the DMG at the cursed items there for inspiration, and let your imagination run wild!
Because a cursed monocle that makes you half your height is forgettable, but one that makes you talk and act like a posh Waterdhavian Noble with a heap of contempt for their 'lessers' is much more fun.