 Endoleaks are one of the most common complications following endovascular aneurysm repair, EVAR. There are five types of endoleaks, depending on their origin, which can be classified as either direct or indirect. Direct endoleaks type 1 and 3 are more likely to cause aneurysm rupture due to rapid sac expansion while indirect endoleaks types 2, 4, and 5 are less likely to cause any serious consequences. Type 5 endotension is a special case where sac enlargement occurs despite no demonstrable endoleak. Improved stent graph technology has helped reduce the incidence of endoleaks. This review discusses the pathophysiology, risk factors, and treatment options for each type of endoleak. This article was authored by Ziaur Rehman.