Cross-site Scripting (XSS) Affecting python313-mistune package, versions <3.1.3-160000.5.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.19% (9th percentile)

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  • Snyk IDSNYK-SLES1600-PYTHON313MISTUNE-18000083
  • published17 Jul 2026
  • disclosed14 Jul 2026

Introduced: 14 Jul 2026

CVE-2026-59926  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 python313-mistune to version 3.1.3-160000.5.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python313-mistune package and not the python313-mistune package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1