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CVE-2026-2327

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/12/2026

Last Modified2/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

markdown-it_project:markdown-it

Weaknesses (CWE)

CWE-1333

References

https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917(report@snyk.io)

https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33(report@snyk.io)

https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26(report@snyk.io)

https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750(report@snyk.io)

https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917(134c704f-9b21-4f2e-91b3-4a467353bcc0)

https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.