CFBDSIR 2149-0403 (full designation CFBDSIR J214947.2-040308.9) is a free-floating planetary-mass object or possibly a low-mass brown dwarf, likely part of the AB Doradus moving group (ABDMG) as indicated by its position and proper motion. There is insufficient evidence to demonstrate that CFBDSIR 2149-0403 formed as a planet and was subsequently ejected. Although there have been candidates for objects like this reported before, it is the first such object with a spectroscopically confirmed low age and an upper limit on its estimated mass below 13 Jupiter masses. It must be noted that the estimation of its mass rely on its suspected membership in AB Doradus (which provides a distance and an age), as well as on the current generation of brown dwarfs evolutionary models. It is thus by no mea