According to policy, the specific substance Cyborg tested positive for has not been released.
This news comes a little over a week after Cyborg took Dana White and the UFC to task for not including her in the inaugural UFC women's Featherweight Title bout scheduled for UFC 208.
White maintains he gave Cyborg two opportunities to compete in this fight, but she declined. Cyborg says she asked for a later date, but wasn't granted her request.
There will be some speculation as to whether the UFC knew about Cyborg's impending suspension, or if the decision to pit Holly Holm and Germaine de Randamie was a product of the two sides working on different schedules.