Despite warnings from Iraq's ambassador to the Holy See that the 77-year-old could be in danger - and reports in the Italian media of new IS recruits returning from the Middle East to Albania - the Vatican said security measures would remain unchanged.
The Argentine pontiff, who habitually throws caution to the winds to mingle with the crowds, will use the same open-topped vehicle he uses in Saint Peter's Square at a mass in Tirana, the capital of one of Europe's poorest countries.
"In cases like this, where there is an unjust aggression, then it is licit to halt the aggressor," he said in an interview last month.
"But I stress 'halt'. I don't say bomb, or make war, but rather stop him," Francis said.
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Vatican spokesman Federico Lombardi said he knew nothing about any concrete threats to the pope and the Albania trip would go ahead as planned.
From Tirana, the pope will go to Fushe-Kruja, 20 kilometres away, to visit a centre for orphans and disabled children - a trip he would not be making if there were any concerns over security, authorities in the Albanian capital said.
However, in an interview with Italy's La Nazione daily this week, Iraq's ambassador to the Holy See, Habib Al Sadr, said "what has been declared by the self-declared Islamic State is clear. They want to kill the pope. The threats against the pope are credible."
The Corriere della Sera daily cited a unidentified source in Tirana, saying: "The jihadists have always claimed that their final objective was Rome. But if Rome comes to Tirana, even for a few hours, that objective becomes even simpler.