Doctors reattached a feeding tube that became loose in Gabor's stomach and led to bleeding along with an infection.
The 94-year-old actress was rushed to the hospital Saturday morning after losing consciousness at her Bel Air mansion.
Before the surgery, her husband, Frederic Prinz von Anhalt, said he's hopeful she'll be back home soon.
"She is going to be okay. She is going to be out. She went through it a couple of times and now she has it again, and her doctors are going to fix it. They're very good at it usually. They're going to fix it, and she'll be out in a couple of days," Von Anhalt said.
Gabor has been in and out of the hospital since July 2010 when she fell out of bed and broke a hip. The actress had to have a leg amputated back in January.
She has appeared in films ranging from "Moulin Rouge" in 1952 to "Queen of Outer Space" in 1958. She also appeared on TV specials, game shows, and guest-starred on various TV series, often playing herself.