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    CVE-2026-44896

    Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when HTMLRenderer(escape=True) is used, because these values bypass the inline renderer. Version 3.2.1 contains a patch.

    Published:May 26, 2026
    Last Modified:Jun 8, 2026
    EPS:May 26, 2026
    EPSS Score:0.00032
    CVSS Score:6.1

    Affected Products

    Vendor
    Lepture
    Product
    Mistune
    Vendor
    Mistune Project
    Product
    Mistune

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-59924 (CVSS 5.9) — Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, Include.parse() joins and norm…
    CVE-2026-59929 (CVSS 6.1) — Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the safe_url filter in src/mis…
    CVE-2026-59925 (CVSS 7.5) — Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, long sequences of well-formed …
    CVE-2026-59926 (CVSS 5.3) — Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, render_admonition() in src/mis…
    CVE-2026-59923 (CVSS 6.1) — Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, HTMLRenderer.safe_url() does n…
    CVE-2026-59930 (CVSS 4.3) — Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the toc plugin and TableOfCont…
    CVE-2026-59922 (CVSS 7.5) — Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a run of closed tilde, equals-…

    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