High severity7.5NVD Advisory· Published Apr 24, 2026· Updated Apr 28, 2026
CVE-2026-41680
CVE-2026-41680
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
markednpm | >= 18.0.0, < 18.0.2 | 18.0.2 |
Affected products
2Patches
Vulnerability mechanics
References
3- github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-6v9c-7cg6-27q7ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-41680ghsaADVISORY
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