Provide references for CVE-2021-3639.
Where can I find more information about CVE-2021-3639?
References are available at: https://bugzilla.redhat.com/show_bug.cgi?id=1980648, https://access.redhat.com/security/cve/CVE-2021-3639, https://github.com/latchset/mod_auth_mellon/commit/42a11261b9dad2e48d70bdff7c53dd57a12db6f5.