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CVE-2026-59927

5.3 medium SSVC exploitation: none Analyzed
NVD · CVE.org

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the Include directive in src/mistune/directives/include.py detects only direct self-includes and not indirect cycles, allowing two markdown files that include each other to trigger unbounded recursion, raise RecursionError, and crash the rendering request. This issue is fixed in version 3.3.0.

Fix

Patch, vendor advisory and mitigation references on NVD 1

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 5.3 · mistune_projectNVD modified 2026-10-25 17:10

Affected (CPE criteria) 1

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

References 3