CVE-2026-41680
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Marked
PublishedApr 24, 2026
First seenApr 24, 2026
How to fix
Update
- marked_project marked18.0.2 or later
- marked18.0.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| marked_project marked | 18.0.0 ≤ v < 18.0.2 | 18.0.2 |
| markednpm | 18.0.0 ≤ v < 18.0.2 | 18.0.2 |
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