Vulnerability Details CVE-2026-2327
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 3.6%
CVSS Severity
CVSS v3 Score 5.3
References
- https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
- https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33
- https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26
- https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
- https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
- https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750
Products affected by CVE-2026-2327
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cpe:2.3:a:markdown-it_project:markdown-it:13.0.0
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cpe:2.3:a:markdown-it_project:markdown-it:13.0.1
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cpe:2.3:a:markdown-it_project:markdown-it:13.0.2
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cpe:2.3:a:markdown-it_project:markdown-it:14.0.0
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cpe:2.3:a:markdown-it_project:markdown-it:14.1.0