Memory Consumption Vulnerability in Python Markdownify by Matthew Withan

CVE-2025-46656

Summary

The python-markdownify library, prior to version 0.14.1, introduces a vulnerability that permits the use of excessively large headline prefixes, such as , alongside standard headings like through . This flaw can lead to significant memory consumption, potentially impacting the performance and availability of applications utilizing this library. It's crucial for developers using python-markdownify to update to version 0.14.1 or later to mitigate this issue and ensure their applications remain stable.

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