CVE-2026-2327

5.3 MEDIUM
Published: February 12, 2026 Modified: February 23, 2026
View on NVD

Description

Versions of the package markdown-it from 13.0.0 and before 14.1.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of the regex /\*+$/ in the linkify function. An attacker can supply a long sequence of * characters followed by a non-matching character, which triggers excessive backtracking and may lead to a denial-of-service condition.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
Source: report@snyk.io
Vendor Advisory
https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33
Source: report@snyk.io
Broken Link
https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26
Source: report@snyk.io
Patch Product
https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
Source: report@snyk.io
Third Party Advisory
https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Vendor Advisory
https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Third Party Advisory

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.0%
5th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-1333

Affected Vendors

markdown-it_project

Related CVEs

CVE-2026-4539 3.3
CVE-2026-4538 5.3
CVE-2026-4537 4.7
CVE-2026-4536 7.3
CVE-2026-4535 8.8