CVE-2026-46338
Published:July 16, 2026
Updated:July 21, 2026
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.
Affected Packages
pymdown-extensions (CONDA):
Affected version(s) >=10.0.1 <10.21.3Fix Suggestion:
Update to version 10.21.3https://github.com/facelessuser/pymdown-extensions.git (GITHUB):
Affected version(s) >=10.0.1 <10.21.3Fix Suggestion:
Update to version 10.21.3pymdown-extensions (PYTHON):
Affected version(s) >=10.0.1 <10.21.3Fix Suggestion:
Update to version 10.21.3Related Resources (8)
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Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS
Base Score:
0.26