For native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token could leak when used for downloading files. This vulnerability affects Firefox for iOS < 26.
{
"cpe": "cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:iphone_os:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "26.0"
}
],
"source": "CPE_RANGE"
}