CVE-2026-41680

Marked is a markdown parser and compiler. From 18.0.0 to 18.0.1, a critical Denial of Service (DoS) vulnerability exists in marked. By providing a specific 3-byte input sequence a tab, a vertical tab, and a newline (\x09\x0b\n)—an unauthenticated attacker can trigger an infinite recursion loop during parsing. This leads to unbounded memory allocation, causing the host Node.js application to crash via Memory Exhaustion (OOM). This vulnerability is fixed in 18.0.2.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7	Exploit Vendor Advisory
https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:marked_project:marked:*:*:*:*:*:node.js:*:*

History

28 Apr 2026, 19:37

Type	Values Removed	Values Added
References	~~() https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7 -~~	() https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7 - Exploit, Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CPE		cpe:2.3:a:marked_project:marked::::::node.js::*
First Time		Marked Project Marked Project marked

24 Apr 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7 -~~	() https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7 -

24 Apr 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-24 18:16

Updated : 2026-04-28 19:37

NVD link : CVE-2026-41680

Mitre link : CVE-2026-41680

CVE.ORG link : CVE-2026-41680

JSON object : View

Products Affected

marked_project

marked

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-674

Uncontrolled Recursion

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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