markdown-it is has a Regular Expression Denial of Service (ReDoS)

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.

Recommendation

Update the markdown-it package to the latest compatible version. Followings are version details:

• Affected version(s): >= 13.0.0, < 14.1.1
• Patched version(s): 14.1.1

References

• GHSA-38c4-r59v-3vqw
• security.snyk.io
• CVE-2026-2327
• CWE-1333
• CAPEC-310
• OWASP 2021-A6

Related Issues

• tarteaucitron.js has Regular Expression Denial of Service (ReDoS) vulnerability - CVE-2026-22809
• Parse Server has Regular Expression Denial of Service (ReDoS) via `$regex` query in LiveQuery - CVE-2026-30925
• jspdf vulnerable to Regular Expression Denial of Service (ReDoS) - CVE-2021-23353
• Regular Expression Denial of Service (ReDoS) in ua-parser-js - CVE-2021-27292

Tags:

npm

markdown-it