Heat oven to 325°F. Line the bottom of a 9-inch springform pan with parchment.
Simmer cranberries, sugar, orange juice, and 1/4 cup water in a saucepan over medium heat until berries burst, 6–8 minutes.
Stir cornstarch with 1 tbsp cold water. Drizzle into the cranberries and cook, stirring, until glossy and thick, 1–2 minutes. Cool completely.
Combine crumbs, crust sugar, and salt. Stir in melted butter until evenly moistened.
Press crust firmly into the pan bottom. Bake 8–10 minutes. Cool while you make the filling.
Beat cream cheese on medium speed until smooth. Add filling sugar and flour; mix just to combine.
Blend in sour cream, vanilla, and orange zest. Add eggs one at a time on low, mixing just until incorporated.
Pour filling over the crust. Spoon cooled cranberry sauce in dollops and gently swirl with a knife.
Bake 50–60 minutes until edges are set and the center wobbles slightly. Turn off oven and crack the door for 30 minutes.
Cool on a rack 1 hour, then chill uncovered until cold and set, at least 4 hours or overnight. Unmold and slice.