People magazine says although this year's Oscar winner did not have to be admitted to hospital, it wasn't known how serious the injury was.
The accident occurred on the sets of the science fiction film when Charlize was doing her own stunts.
She was executing a wire-hanging scene when the mishap took place.
Shooting has been halted to help the actress recover.
To prepare for her title role as Aeon Flux -- a futuristic assassin -- Charlize lost weight, went through a rigorous exercise regime and dyed her hair black from her beautiful blonde.
Her training included a high-protein, low-carb diet and a four-hour daily workout. She also learned some gymnastic moves.
For Monster, which got her an Oscar, she put on weight to fit into the role of a serial killer.
In Aeon Flux, she is a commando, member of a group that rebels against the government. The film is set in the future where most of the population has been wiped out by plague.
Based on Peter Chung's MTV animated series, it also stars Oscar winner (Fargo) Frances McDormand, Marton Csokas and Jonny Lee Miller.
Charlize's next release is a fortnight away. She stars in Head on the Clouds, opposite real life boyfriend, Stuart Townsend.
Photograph: Getty Images