CVE-2026-111759
highmarkdown-it is a Markdown parser.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/markdown-it/markdown-it/commit/1b379c1b6d0522421bd1a51b77337c79af2c8670 security-advisories@github.com
- https://github.com/markdown-it/markdown-it/commit/cf27366035edf9196667110c47d9d67b030a4152 security-advisories@github.com
- https://github.com/markdown-it/markdown-it/commit/daf5a3c32303e5d9de01b12eeb725fb5990b8162 security-advisories@github.com
- https://github.com/markdown-it/markdown-it/releases/tag/14.3.2 security-advisories@github.com
- https://github.com/markdown-it/markdown-it/releases/tag/15.0.2 security-advisories@github.com
- https://github.com/markdown-it/markdown-it/security/advisories/GHSA-r7fv-28h4-cvq7 security-advisories@github.com
- https://github.com/markdown-it/markdown-it/security/advisories/GHSA-r7fv-28h4-cvq7 134c704f-9b21-4f2e-91b3-4a467353bcc0