A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge (HTML-based), aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1427, CVE-2019-1428, CVE-2019-1429.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1426