Ugh. MITRE is now moving to a new CVE ID portal that requires you to have a Google account.

https://mitre.github.io/mitre-cve-roles/cve-id-request/#cvePortal

For the time being, the "legacy" portal is still functional:
https://cveform-legacy.mitre.org

But, seriously, WTF.

CVE Request Form

The CVE request form provides intake of vulnerability information for review by a CNA-LR.

@jschauma You need to be logged into GitHub to search. It is a valuable information, who searches for what.