mfa/FIDO2.py in django-mfa2 before 2.5.1 and 2.6.x before 2.6.1 allows a replay attack that could be used to register another device for a user. The device registration challenge is not invalidated after usage.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-42731.json"