CVE-2021-21306: Marked Project Marked

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

Marked is an open-source markdown parser and compiler (npm package "marked"). In marked from version 1.1.1 and before version 2.0.0, there is a Regular expression Denial of Service vulnerability. This vulnerability can affect anyone who runs user generated code through marked. This vulnerability is fixed in version 2.0.0.

Affected products

• Marked Project Marked: from 1.1.1, before 2.0.0 (fixed in 2.0.0)

Published 2021-02-08. Last modified 2026-06-17.