CVE-2026-41680

HIGH

Marked: OOM Denial of Service via Infinite Recursion in marked Tokenizer

Title source: cna

Description

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.

References (1)

[X_Refsource_Confirm] https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7

Scores

CVSS v3 7.5

EPSS 0.0009

EPSS Percentile 24.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-400 CWE-674 CWE-835

Status published

Products (2)

marked_project/marked 18.0.0 - 18.0.2

markedjs/marked >= 18.0.0, < 18.0.2

Published Apr 24, 2026

Tracked Since Apr 24, 2026