The Southampton loanee was dismissed in the 63rd minute after an altercation which sparked an on-pitch fracas.
Stevenage defender Kevin Toner was also sent off for his involvement in the incident.
Glovers forward Francois Zoko will serve a three-match ban.
The Ivorian saw red due to dangerous play when attempting to control a high ball with Boro midfielder Jack King.
It means Zoko will miss the home matches with Southend United (Saturday) and Swindon Town (November 18th) as well as the trip to Carlisle United in between (November 11th).
The former Blackpool man will next be available for selection when Town welcome Notts County to Huish Park on Tuesday, November 21st.