In a statement, Francis's nine cardinal advisers expressed their "full solidarity" with the Pope over the scandal which has thrown his papacy into crisis.
The cardinals, who are meeting at the Vatican this week, said they were aware that "the Holy See is working on formulating the potential and necessary clarifications".
Francis has refused to respond to an 11-page document published on August 26 by a retired ambassador to the US, Archbishop Carlo Maria Vigano.
Mr Vigano named more than two dozen current and former Vatican and US officials and accused them of knowing about and covering up for ex-cardinal Theodore McCarrick, who is accused of sexually molesting and harassing minors as well as adults.
Mr Vigano accused Francis of rehabilitating McCarrick from canonical sanctions imposed on him by Pope Benedict XVI in 2009 or 2010.
The Vatican has known since at least 2000 that McCarrick slept with seminarians.
Francis removed McCarrick as cardinal in July following accusations that he groped a teenage altar boy in the 1970s, a canonical crime that could result in him being defrocked.
Francis's refusal to immediately respond to Mr Vigano's claims has frustrated many Catholics in the US, who were already outraged that McCarrick's penchant for seminarians and young priests was apparently an open secret in some church circles.
That outrage has been compounded by the revelations of a Pennsylvania grand jury report detailing the abuse of more than 1,000 children by 300 priests over 70 years, while bishops covered up for them.
Francis's nine cardinal advisers issued the statement at the start of three days of meetings to hand in the fruit of their five years of work: a proposal to reform the Vatican bureaucracy.
With their work essentially finished and some of the cardinals implicated in sex abuse or cover-up scandals, the prelates asked Francis to reflect on the "work, structure and composition of the council, taking into account the advanced age of some members".
That could suggest Francis has an elegant way of getting rid of prelates such as Chilean Cardinal Javier Errazuriz, accused by some of being a key figure in Chile's wretched record on abuse and cover-up. Mr Errazuriz, the retired archbishop of Santiago, is 85 and well over retirement age.
Another ageing member of the council is Cardinal George Pell, 77, who is on trial in his native Australia on historic allegations of sex abuse. He has denied wrongdoing and is on a leave of absence from his job as the Vatican's finance minister.
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