HA is accessible from the Internet without authentication

Hello,
my Hommeassistant is accessible with authentification from the internet. I thought so. Today I check weblogs and see over 1000 entries like this:

"GET /frontend_latest/58ee7cbc.js HTTP/1.1"
"GET /frontend_latest/58efe104.js HTTP/1.1"
"GET /frontend_latest/59539680.js HTTP/1.1"
"GET /frontend_latest/59dbce41.js HTTP/1.1"
"GET /frontend_latest/5a306634.js HTTP/1.1"
"GET /frontend_latest/5aa5ab63.js HTTP/1.1"
"GET /frontend_latest/5abf7e35.js HTTP/1.1"
"GET /frontend_latest/5ae1a230.js HTTP/1.1"
"GET /frontend_latest/5b8753bd.js HTTP/1.1"
"GET /frontend_latest/5bffc9a1.js HTTP/1.1"
"GET /frontend_latest/5c548b3c.js HTTP/1.1"
"GET /frontend_latest/5c5ff45e.js HTTP/1.1"
"GET /frontend_latest/5cac9985.js HTTP/1.1"
"GET /frontend_latest/5d222f99.js HTTP/1.1"
"GET /frontend_latest/5d335b00.js HTTP/1.1"
"GET /frontend_latest/5d6fd8f4.js HTTP/1.1"
"GET /frontend_latest/5e284d69.js HTTP/1.1"
"GET /frontend_latest/5f32d82d.js HTTP/1.1"

Then I checked and found that these pages are actually accessible from the Internet without authentication. Right off the bat, I could not discover any personal information.
Can anyone tell me what it is?

Thanks a lot