Multiple Chase.com customers have reported logging in to their bank accounts, only to be presented with another customer’s bank account details.
Chase has acknowledged the incident and stated that it was a glitch and not any hacking attempt.
It was caused by an internal “glitch” Wednesday evening that did not involve any kind of hacking attempt or cyber attack.
Source: https://krebsonsecurity.com/2018/02/chase-glitch-exposed-customer-accounts/
"id": "CHA10418622",
"linkid": "chase",
"type": "Breach",
"date": "02/2018",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"