Yes, I seem to be getting the same issue, it might just be an outage.

Dnia 11 października 2022 08:46:40 GMT+01:00, Adi Matalon <adi.matalon@whitesourcesoftware.com> napisał/a:
Hi, 
Currently we are getting 404 from this url https://security.archlinux.org/CVE-2019-8343,
it happens for all cve ids.
Are you aware of this?