from flask import Flask, request, make_response, Response @app.route("/good1") def good1(): resp = make_response() resp.set_cookie("sessionid", value="value", secure=True, httponly=True, samesite='Strict') # GOOD: Attributes are securely set return resp @app.route("/good2") def good2(): resp = make_response() resp.headers['Set-Cookie'] = "sessionid=value; Secure; HttpOnly; SameSite=Strict" # GOOD: Attributes are securely set return resp @app.route("/bad1") def bad1(): resp = make_response() resp.set_cookie("sessionid", value="value", samesite='None') # BAD: the SameSite attribute is set to 'None' and the 'Secure' and 'HttpOnly' attributes are set to False by default. return resp