Regular Expression Denial of Service in marked

published 2018-06-07 8 y ago modified 2026-06-17 4 mo ago also GHSA-x5pg-88wf-qq4p , EUVD-2018-0342

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

The marked module is vulnerable to a regular expression denial of service. Based on the information published in the public issue, 1k characters can block for around 6 seconds.

Patch / fix

fixed in 2 distros 1

npm marked 0.3.9
marked_project marked 0.3.9

node-marked Debian 14, Debian 13, Debian 12 0.3.9+dfsg-1

debian advisories DEBIAN-CVE-2017-16114

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-16114 updated 2025-11-21 cvss 7.5

nodejs-marked: Regular expression denial of service

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.73% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/chjj/marked/issues/937 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	marked	<0.3.9	0.3.9

Affected products

HackerOne marked node module

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

github.com /chjj/marked/issues/937
web, exploit, issue-tracking, third-party-advisory
nodesecurity.io /advisories/531
third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2017-16114
advisory
github.com /advisories/GHSA-x5pg-88wf-qq4p
advisory
npmjs.com /advisories/531
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary