Vulnerability Database · npm · markdown-it · Version
markdown-it 12.0.4
12.0.4 is affected by 4 vulnerabilities.
The vulnerabilities that cover this exact version are listed below with the fixed version to move to. The upgrade Vulert recommends: 15.0.3.
Critical 0 High 0 Medium 3 Low 1 Unrated 0
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Released 20 Dec 2020
Licence MIT
Also known from other sources 5
Newer releases 89
Database updated 23/Oct/2026
Release and licence data published by the npm registry. Licence information is not legal advice.
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01 Vulnerabilities affecting this version
markdown-it 12.0.4 vulnerabilities
4 vulnerabilities cover markdown-it 12.0.4. Open the full list in the database.
| Vulnerability | Severity | Fixed version | Disclosed |
|---|---|---|---|
| CVE-2026-48988: markdown-it Quadratic Complexity DoS via Smartquotes Rule | 5.3 medium | 14.2.0 | 15 Jun 2026 |
| CVE-2026-48988: markdown-it Quadratic Complexity DoS via Smartquotes Rule | 5.3 medium | 14.2.0 | 15 Jun 2026 |
| CVE-2022-21670: Uncontrolled Resource Consumption in markdown-it | 5.3 medium | 12.3.2 | 12 Jan 2022 |
| CVE-2026-111766: markdown-it Quadratic-Time Denial of Service in Inline HTML Parsing | 3.7 low | 14.3.3 | 20 Oct 2026 |
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Questions
About markdown-it 12.0.4
Is markdown-it 12.0.4 vulnerable?
Yes. 4 vulnerabilities in the Vulert database cover markdown-it 12.0.4: 0 critical, 0 high, 3 medium and 1 low. The upgrade Vulert recommends is 15.0.3, and each entry above names the fixed version to move to.
Which version of markdown-it should I use instead of 12.0.4?
15.0.3 is the version Vulert recommends for this release line. The version table on the package page lists every release with the vulnerabilities recorded against it.
Is 12.0.4 the latest release of markdown-it?
No. 12.0.4 was published 20 Dec 2020, and newer releases exist. Newer is not automatically safer — the version table on the package page shows what each release carries.
How do I monitor markdown-it for upcoming vulnerabilities?
Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the markdown-it version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.