CVE-2026-46338

Published: Jul 16, 2026Modified: Jul 17, 2026

4.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Exploitability: 2.8 / Impact: 1.4

Source: security-advisories@github.com (Secondary)

Description

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.

Related CWEs

CWE-22

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

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (4)

https://github.com/facelessuser/pymdown-extensions/commit/63b7835776d703d6c339cf2110d9888f676efc0c

Source: security-advisories@github.com

https://github.com/facelessuser/pymdown-extensions/releases/tag/10.21.3

Source: security-advisories@github.com

https://github.com/facelessuser/pymdown-extensions/security/advisories/GHSA-62q4-447f-wv8h

Source: security-advisories@github.com

https://github.com/facelessuser/pymdown-extensions/security/advisories/GHSA-62q4-447f-wv8h

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

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