Algorithmic Complexity 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
0.41% (34th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-SLES1600-PYTHON313MISTUNE-18000235
  • published17 Jul 2026
  • disclosed14 Jul 2026

Introduced: 14 Jul 2026

CVE-2026-59928  (opens in a new tab)
CWE-407  (opens in a new tab)
CWE-1333  (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 3.3.0, a Markdown document containing many repeated or distinct reference-link definitions causes quadratic work in src/mistune/block_parser.py and the ref_links environment dictionary handling, allowing denial of service through CPU exhaustion. This issue is fixed in version 3.3.0.

CVSS Base Scores

version 3.1