CVE-2022-21670

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    CVE-2022-21670

    Published: 10 Jan 2022Last Modified: 12 Aug 2026

    Summary: Uncontrolled Resource Consumption in markdown-it

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21670.json, https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c, https://nvd.nist.gov/vuln/detail/CVE-2022-21670, https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -ffc49ab46b5b751cd2be0aabb146f2ef84986101

    Affected versions

    12.3.1
    12.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2022-21670 | CVE-DB