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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (27.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.003 · change: -0.002
Affected products
- Markedjs Marked — versions >= 18.0.0, < 18.0.2
- Marked Project
Weakness classification (CWE)
References
- github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7 (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.