CVE-2026-2327

Name: CVE-2026-2327
Creator: NVD / NIST
Published: 2026-02-12T06:16:02.243+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2026-2327 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

5.5/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.50%

39.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1333

Affected Software

Vendor	Product	Versions
Markdown-It Project	Markdown-It	>= 13.0.0, < 14.1.1

References

https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917Vendor Advisory
https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33Broken Link
https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26Patch, Product
https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750Third Party Advisory
https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917Vendor Advisory
https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750Third Party Advisory

Timeline

Published: Feb 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-2327?

How severe is CVE-2026-2327?

CVE-2026-2327 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2327?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2327?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST