CVE-2026-59924

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, Include.parse() joins and normalizes user-supplied include paths without verifying that the result remains within the intended markdown directory, allowing crafted include paths to access files outside that directory when markdown files are processed using md.read(). This issue is fixed in version 3.3.0.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/lepture/mistune/commit/1bef343ade163fc3bb95572b15be720084cdb993	Patch
https://github.com/lepture/mistune/releases/tag/v3.3.0	Release Notes
https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf	Exploit Vendor Advisory
https://github.com/lepture/mistune/security/advisories/GHSA-r4rv-85jg-w4mf	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Mistune es un analizador de Markdown para Python con renderizadores y complementos. Antes de la versión 3.3.0, Include.parse() une y normaliza rutas de inclusión proporcionadas por el usuario sin verificar que el resultado permanezca dentro del directorio de markdown previsto, lo que permite que rutas de inclusión manipuladas accedan a archivos fuera de ese directorio cuando los archivos de markdown se procesan usando md.read(). Este problema se solucionó en la versión 3.3.0.

Information

Published : 2026-07-08 17:17

Updated : 2026-10-25 17:10

NVD link : CVE-2026-59924

Mitre link : CVE-2026-59924

CVE.ORG link : CVE-2026-59924

JSON object : View

Products Affected

mistune_project

mistune

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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