Fixed in v1.5.1, Argo version v1.5.0 was vulnerable to a user-enumeration vulnerability which allowed attackers to determine the usernames of valid (non-SSO) accounts because /api/v1/session returned 401 for an existing username and 404 otherwise.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-11576.json"