CVE-2026-59926
UNKNOWN
NVD
CVSS Score
0
Severity
UNKNOWN
Published
Jul 08, 2026
Vendor
unknown
Description
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, allowing attribute injection and cross-site scripting even when HTMLRenderer escape mode is enabled. This issue is fixed in version 3.2.1.