CVE-2022-21680 HIGH

CVE-2022-21680: Cubic catastrophic backtracking (ReDoS) in marked

Vendor Markedjs
Product marked
Weakness CWE-400
Published January 14, 2022
Last update April 22, 2025

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.

Key dates

02Disclosure timeline

January 14, 2022 CVE published
April 22, 2025 Record updated

Related vulnerabilities

04Related CVE