Leanne Baxter, from Antrim Road in the city, admitted a wounding charge at Belfast Crown Court.
Branding Baxter as the prime mover in the attack, Judge Stephen Fowler QC said the incident justified a custodial sentence.
The 35-year-old and two younger women were arrested after the injured party was assaulted and stabbed in her home and again in the street as she tried to flee.
Police were alerted to the attack in Bendigo Street at around 11pm on October 25, 2019, and when they arrived they found the victim.
A blood-stained knife was discovered and the injured woman named her attackers as Baxter and two others. The trio were arrested a short time later at Lanyon Place, where Baxter discarded the victim s phone in bushes.
Woman sentenced over East Belfast attack where victim was slashed and stabbed at own home belfastlive.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from belfastlive.co.uk Daily Mail and Mail on Sunday newspapers.