XSS in Lepture Mistune

CVE-2026-59926

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, render_admonition() in src/mistune/directives/admonition.py concatenates the Admonition directive :class: option into the HTML class attribute without escaping…

Vulnerability class: XSS (Cross-Site Scripting)

Affected products

Weakness classification (CWE)

References