Kivikakk Comrak vulnerabilities

• comrak project comrak Attacker controlled data in AST nodes is not validated in comrak CVE-2023-28631 Fix available 5.3 MediumMarch 28, 2023
• comrak project comrak Quadratic runtime when parsing Markdown in comrak CVE-2023-28626 Fix available 5.3 MediumMarch 28, 2023