p PatchFirst

CVE-2026-111759

CVE-2026-111759 · markdown-it: Quadratic complexity in smartquotes with unmatched closing quotes

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 7.5 · High · EPSS 0.6% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • markdown-it

    Versions
    • >= 15.0.0, < 15.0.2: Affected
    • < 14.3.2: Affected

    No fix published

  • node-markdown-it Debian:12

    Versions
    • 22.2.3+dfsg+~12.2.3-2
    • 22.2.3+dfsg+~12.2.3-3
    • 22.2.3+dfsg+~12.2.3-4
    • 22.2.3+dfsg+~12.2.3-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-markdown-it Debian:13

    Versions
    • 22.2.3+dfsg+~12.2.3-2
    • 22.2.3+dfsg+~12.2.3-3
    • 22.2.3+dfsg+~12.2.3-4
    • 22.2.3+dfsg+~12.2.3-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-markdown-it Debian:14

    Versions
    • 22.2.3+dfsg+~12.2.3-2
    • 22.2.3+dfsg+~12.2.3-3
    • 22.2.3+dfsg+~12.2.3-4
    • 22.2.3+dfsg+~12.2.3-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • markdown-it npm

    Affected ranges
    • SEMVER: ≥ 15.0.0, < 15.0.2

    Update to 15.0.2

  • markdown-it npm

    Affected ranges
    • SEMVER: < 14.3.2

    Update to 14.3.2

  • node-markdown-it Ubuntu:22.04:LTS

    Versions
    • 10.0.0+dfsg-2
    • 10.0.0+dfsg-3
    • 10.0.0+dfsg-3.1
    • 10.0.0+dfsg-4
    • 10.0.0+dfsg-5
    • 10.0.0+dfsg-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-markdown-it Ubuntu:24.04:LTS

    Versions
    • 22.2.3+dfsg+~12.2.3-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-markdown-it Ubuntu:26.10

    Versions
    • 22.2.3+dfsg+~12.2.3-4
    • 22.2.3+dfsg+~12.2.3-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-markdown-it Ubuntu:26.04:LTS

    Versions
    • 22.2.3+dfsg+~12.2.3-2
    • 22.2.3+dfsg+~12.2.3-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →