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CVE-2026-59925

7.5 high SSVC exploitation: none Analyzed
NVD · CVE.org

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, long sequences of well-formed double-asterisk or triple-asterisk emphasis pairs around a character cause quadratic work in src/mistune/inline_parser.py because the parser scans forward for matching close markers from every potential opening run, allowing denial of service in default Mistune parsing. This issue is fixed in version 3.3.0.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.5 · mistune_projectNVD modified 2026-10-25 17:10

Affected (CPE criteria) 1

  • cpe:2.3:a:mistune_project:mistune:*:*:*:*:*:*:*:*

References 3