GitHub was hit by a major DDoS attack that made the website unavailable to many users for several hours.
The attackers injected malicious JavaScript code into the pages of those websites that were responsible for the hijacking of their visitors to Github.
Github investigated the incident and removed several repositories to secure its servers.
"id": "GIT105924422",
"linkid": "github",
"type": "Cyber Attack",
"date": "08/2015",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"