Despite currently being engaged in a four-way battle for the Bundesliga title with Borussia Dortmund, Schalke and Borussia Monchengladbach, Bayern failed to bring in any reinforcements during the recent transfer window, leading the suggestions coach Jupp Heynckes believes his current side is strong enough to win the league.
However, Ribery believes this decision could jeopardise their title chances as he feels the current squad at the Allianz Arena is lacking in depth.
"I think it is a big problem for us if two or three players are injured," Ribery told Sport1.
"We do not have a really good bench and have no really good second team."
Bayern struggled earlier on in the season when talismanic midfielder Bastian Schweinsteiger was ruled out with an injury, suggesting Ribery could have a point with his concerns.
Nonetheless, the French international's comments are unlikely to go down well with club CEO Karl-Heinz Rummenigge, who on the same day revealed it had been Heynckes' decision not to dip into the transfer market.
"It was the desire of the coach not to make any changes in the winter," Rummenigge told Bild.
"We hope that we can get through with this squad."
Bayern are currently top of the Bundesliga but are only ahead of Dortmund and Schalke on goal difference, while Gladbach remain just a point behind the trio.