Carbonite poisoning was a side-effect of an improper carbon-freezing process. While hibernation sickness is an expected side-effect of being suspended in carbonite for a long time, imperfections during the process could poison the encased individual, who without medical assistance would eventually succumb to death. The Commander contracted carbonite poisoning after being frozen in carbonite by the orders of Emperor Arcann, and survived only because Valkorion used the Force to save the Commander's life.
Carbonite poisoning appears in Star Wars: The Old Republic: Knights of the Fallen Empire expansion, released with Update 4.0.
Carbonite poisoning appears in Star Wars: The Old Republic: Knights of the Fallen Empire expansion, released with Update 4.0.