CVE-2022-21670
MEDIUM5.3EPSS 1.1%Uncontrolled Resource Consumption in markdown-it
Published: 1/12/2022Modified: 4/28/2026
Description
markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading.
Affected packages (2)
- Debian/node-markdown-itfrom 0, < 10.0.0+dfsg-2+deb11u1
- npm/markdown-itfrom 0, < 12.3.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2022-21670
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2022-21670
- PATCHhttps://github.com/markdown-it/markdown-it
- WEBhttps://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101
- WEBhttps://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c