CVE-2025-68142

PyMdown Extensions is a set of extensions for the `Python-Markdown` markdown project. Versions prior to 10.16.1 have a ReDOS bug found within the figure caption extension (`pymdownx.blocks.caption`). In systems that take unchecked user content, this could cause long hanges when processing the data if a malicious payload was crafted. This issue is patched in Release 10.16.1. As a workaround, those who process unknown user content without timeouts or other safeguards in place to prevent really large, malicious content being aimed at systems may avoid the use of `pymdownx.blocks.caption` until they're able to upgrade.

CVSS

No CVSS.

References

Link	Resource
https://github.com/facelessuser/pymdown-extensions/commit/b50d15a56850ed1408a284bba81cc019c6bd72e8
https://github.com/facelessuser/pymdown-extensions/security/advisories/GHSA-r6h4-mm7h-8pmq
https://pypi.org/project/pymdown-extensions/10.16.1

Configurations

No configuration.

History

16 Dec 2025, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-16 18:16

Updated : 2025-12-18 15:08

NVD link : CVE-2025-68142

Mitre link : CVE-2025-68142

CVE.ORG link : CVE-2025-68142

JSON object : View

Products Affected

No product.

CWE

CWE-1333

Inefficient Regular Expression Complexity

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