Security Advisory

CVE-2026-59926

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 16:16:15

Last updated 2026-07-08 19:40:52

Assigner GitHub_M

CVSS score 5.3

State PUBLISHED

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.

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