Resource exhaustion in Markedjs Marked
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.003 (27.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Markedjs Marked — versions >= 18.0.0, < 18.0.2
- Marked_project Marked
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-41680?
- CVE-2026-41680 is a high-severity vulnerability in Markedjs Marked, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-04-24.
- How severe is CVE-2026-41680?
- High severity. CVSS v3 base score is 7.5 out of 10.