The charity, whose name was coined by former Labour Prime Minister Harold Wilson, wants to expand beyond its current remits of relieving poverty in the developing world and running educational campaigns.
Louise Richards, chief executive of the charity, said: "We have been working in areas where poverty and human rights are inextricably linked.
We are changing our objects to ensure greater correlation with many of our partner organisations that work in this area - for example, our human rights work in Colombia."
Human rights are set to become a charitable purpose when the Charities Bill becomes law. The commission's latest guidance on the promotion of human rights says charities can pursue political campaigns to urge countries to improve their human rights records provided political activities do not dominate their activities.
War on Want's new objects will have to be approved at its AGM and by its membership once permission has been given by the commission.