# CVE-2026-41680

> Vulnerability · severity: **HIGH** (CVSS 7.5).

## 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.

## Key facts

- **CVE ID:** CVE-2026-41680
- **Published:** 2026-04-24
- **CVSS severity:** HIGH
- **CVSS base score:** 7.5
- **CWE codes:** CWE-400, CWE-674, CWE-835

## Affected products

- `marked_project:marked`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41680

## Citation

> AI Analytics. CVE-2026-41680. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-41680. Derived from NIST NVD. Licensed CC0.

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