The claim was made by Corbyn in an article in 2003 but has been highlighted recently by the British media after he assumed the leadership of the UK's Labour Party.
In comments that will raise questions about his suitability to lead the Labour Party, Corbyn appeared to blame George Bush and Tony Blair for using the September 11 attacks in New York to allow them to go to war, The Telegraph reported.
"This was turned into an attack on the Taliban and then, subtly, into regime change in Afghanistan," he said.
Corbyn was heavily criticised in the days before winning the Labour leadership after suggesting that the death of Osama was a "tragedy".
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In previous years, Corbyn wrote a series of articles which appear to have endorsed the conspiracy theory about the "New World Order".
In an article for 'Labour Briefing' in 1991, Corbyn wrote, "We now know that the Gulf War was a curtain-raiser for the New World Order: the rich and powerful, white and western will be able to maintain the present economic order with free use of all the weapons they wish for."
That same year, he said in Socialist Campaign Group News, "The aim of the war machine of the United States is to maintain a world order dominated by the banks and multinational companies of Europe and North America."
Lord Mandelson, a labour leader, on Friday said that the party should only consider ousting Corbyn after it is clear the public have realised the party "cannot be elected with Corbyn as leader".