GHSA-38c4-r59v-3vqw
markdown-it is has a Regular Expression Denial of Service (ReDoS)
At a glance
- Published
- Updated
- CVE
- CVE-2026-2327
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS_V4
- 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
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.
Affected packages
| Package | Versions |
|---|---|
| npm · markdown-it | introduced 13.0.0, fixed 14.1.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-2327 ADVISORY
- https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26 WEB
- https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917 WEB
- https://github.com/markdown-it/markdown-it PACKAGE
- https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs#L33 WEB
- https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |