CVE-2026-2327

MEDIUM6.9

Versions of the package markdown-it from 13

Published Feb 12, 2026

Modified 2 weeks ago

Details

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.

References

DETECTION

https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917

WEB

https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33

WEB

https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26

DETECTION

https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-2327

CVSS Analysis