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Vulnerabilities

CVE-2026-44896 | BDVDB-2026-335102 Detail

lepturemistune

Description#

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.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact none, availability impact none. Attack vector: network.

Weaknesses#

  • CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.
  2. Version 2Most recent update recorded in the CVE List.