CVE-2026-46338

PyMdown Extensions is a set of extensions for the Python-Markdown markdown project. From 10.0.1 until 10.21.3, pymdownx.snippets uses a string-prefix containment check in SnippetPreprocessor.get_snippet_path() in pymdownx/snippets.py when `restrict_base_path: True`, allowing markdown snippet directives to read files from sibling paths that share the same base_path prefix, such as docs and docs_internal. This is a regression of CVE-2023-32309. This issue is fixed in version 10.21.3.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/facelessuser/pymdown-extensions/commit/63b7835776d703d6c339cf2110d9888f676efc0c	Patch
https://github.com/facelessuser/pymdown-extensions/releases/tag/10.21.3	Product Release Notes
https://github.com/facelessuser/pymdown-extensions/security/advisories/GHSA-62q4-447f-wv8h	Exploit Mitigation Vendor Advisory
https://github.com/facelessuser/pymdown-extensions/security/advisories/GHSA-62q4-447f-wv8h	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:facelessuser:pymdown_extensions:*:*:*:*:*:*:*:*

History

24 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) PyMdown Extensions es un conjunto de extensiones para el proyecto markdown Python-Markdown. Desde la versión 10.0.1 hasta la 10.21.3, pymdownx.snippets utiliza una comprobación de contención de prefijo de cadena en SnippetPreprocessor.get_snippet_path() en pymdownx/snippets.py cuando ’restrict_base_path: True’, permitiendo que las directivas de fragmento de markdown lean archivos de rutas hermanas que comparten el mismo prefijo base_path, como docs y docs_internal. Esto es una regresión de CVE-2023-32309. Este problema está solucionado en la versión 10.21.3.

Information

Published : 2026-07-16 19:16

Updated : 2026-10-24 20:10

NVD link : CVE-2026-46338

Mitre link : CVE-2026-46338

CVE.ORG link : CVE-2026-46338

JSON object : View

Products Affected

facelessuser

pymdown_extensions

CWE

CWE-22

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

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