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    2 vulnerabilities by gomarkdown

    CVE-2026-40890 (GCVE-0-2026-40890)

    Vulnerability from cvelistv5 – Published: 2026-04-21 19:51 – Updated: 2026-04-21 20:36
    VLAI
    Title
    github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer
    Summary
    The package `github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    gomarkdown markdown Affected: < 759bbc3e32073c3bc4e25969c132fc520eda2778
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2023-42821 (GCVE-0-2023-42821)

    Vulnerability from cvelistv5 – Published: 2023-09-22 16:55 – Updated: 2024-09-24 19:27
    VLAI
    Title
    github.com/gomarkdown/markdown Out-of-bounds Read while parsing citations
    Summary
    The package `github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Prior to pseudoversion `0.0.0-20230922105210-14b16010c2ee`, which corresponds with commit `14b16010c2ee7ff33a940a541d993bd043a88940`, parsing malformed markdown input with parser that uses parser.Mmark extension could result in out-of-bounds read vulnerability. To exploit the vulnerability, parser needs to have `parser.Mmark` extension set. The panic occurs inside the `citation.go` file on the line 69 when the parser tries to access the element past its length. This can result in a denial of service. Commit `14b16010c2ee7ff33a940a541d993bd043a88940`/pseudoversion `0.0.0-20230922105210-14b16010c2ee` contains a patch for this issue.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    gomarkdown markdown Affected: < 0.0.0-20230922105210-14b16010c2ee
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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