readAsText() can indefinitely read the file picked by the user, rather than only once at the time the file is picked in File API in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to access data on the user file system without explicit consent via a crafted HTML page.
[
{
"product": "Chrome",
"vendor": "Google",
"versions": [
{
"lessThan": "66.0.3359.117",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]