Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the renderadmonition function. An attacker can execute arbitrary scripts in the context of the user by injecting malicious content into the :class: option of the Admonition directive, which is not properly...

CVE-2026-59926: Improper Neutralization of Input During Web Page Generation

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, renderadmonition in src/mistune/directives/admonition.py concatenates the Admonition directive :class: option into the HTML class attribute without escaping, allowing attribute injection and cross-site scripting even...