Cross-site Scripting (XSS) Affecting python-mistune package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.2% (10th percentile)

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  • Snyk IDSNYK-RHEL9-PYTHONMISTUNE-17441218
  • published24 Jun 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-44896  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:9 python-mistune.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-mistune package and not the python-mistune package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1