markdown-it is a Markdown parser. Prior to 14.3.2 and 15.0.2, when typographer: true is enabled, specially crafted Markdown can cause quadratic processing time in the smartquotes rule, potentially leading to denial of service in applications processing untrusted input. Many opening double quotes followed by unmatched closing single quotes cause repeated scans of the entire opener stack. The same issue occurs with the quote types reversed. The default configuration (typographer: false) is not affected, but this option is enabled with high probability. This issue is fixed in versions 14.3.2 and 15.0.2.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 3
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-19 18:22
- StatusReceived → Awaiting AnalysisNVD modified 2026-10-19 21:13
- First seenCVSS 7.5NVD modified 2026-10-19 18:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 7
- https://github.com/markdown-it/markdown-it/commit/1b379c1b6d0522421bd1a51b77337c79af2c8670
- https://github.com/markdown-it/markdown-it/commit/cf27366035edf9196667110c47d9d67b030a4152
- https://github.com/markdown-it/markdown-it/commit/daf5a3c32303e5d9de01b12eeb725fb5990b8162
- https://github.com/markdown-it/markdown-it/releases/tag/14.3.2
- https://github.com/markdown-it/markdown-it/releases/tag/15.0.2
- https://github.com/markdown-it/markdown-it/security/advisories/GHSA-r7fv-28h4-cvq7
- https://github.com/markdown-it/markdown-it/security/advisories/GHSA-r7fv-28h4-cvq7