Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Exploitability
AV:LAC:LPR:LUI:NScope
S:UImpact
C:NI:NA:L3.3/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LOther