VDB

CVE-2026-111759

CVE-2026-111759 PUBLISHED CVSS 7.5 HIGH

Reported by GitHub_M · Published October 19, 2026

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.

Risk Scores

CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
markdown-itmarkdown-it>= 15.0.0, < 15.0.2, < 14.3.2
chainguardvitess-240
markdown-itmarkdown-it0, 15.0.0
markdown-itmarkdown-it
wolfirenovate0
wolfivitess-240
chainguardgitlab-rails-ce-19.50
chainguardkibana-9.20
chainguardvitess-220
chainguardrenovate0
chainguardgitlab-rails-ce-19.30
npmmarkdown-it0, 15.0.0

Timeline

  • Oct 19, 2026 CVE Published
  • Oct 19, 2026 CVE Updated
  • Oct 20, 2026 EPSS Score
  • Oct 21, 2026 EPSS Score
  • Oct 24, 2026 EPSS Score
  • Oct 29, 2026 EPSS Score
  • Oct 31, 2026 Security Advisory

References

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