CVE-2025-46656 – Markdownify Headline Prefix Overflow

The following table lists the changes that have been made to the
CVE-2025-46656 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 26, 2025

    Action Type Old Value New Value
    Added Description python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as in addition to

    through

    . This causes memory consumption.
    Added CVSS V3.1 AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
    Added CWE CWE-1284
    Added Reference https://github.com/matthewwithanm/python-markdownify/compare/0.14.0…0.14.1
    Added Reference https://github.com/matthewwithanm/python-markdownify/issues/143
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