CVE-2026-2327

low-risk
Published 2026-02-12

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Markdown-It

Affected Vendors

Markdown-It Project

References (6)

Vendor Advisory https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
Broken Link https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify....
Patch https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33...
Third Party Advisory https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
Vendor Advisory https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
Third Party Advisory https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal