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CVE-2025-46656

Good to know:

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Date: April 25, 2025

python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as <h9999999> in addition to <h1> through <h6>. This causes memory consumption.

Severity Score

Related Resources (6)

https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1
https://github.com/matthewwithanm/python-markdownify/commit/959561879693bf4a576f99c6733b50b01186aa08
https://nvd.nist.gov/vuln/detail/CVE-2025-46656
https://github.com/matthewwithanm/python-markdownify/issues/143
https://github.com/matthewwithanm/python-markdownify
https://www.mend.io/vulnerability-database/CVE-2025-46656

Severity Score

Weakness Type (CWE)

Improper Validation of Specified Quantity in Input

CWE-1284

Top Fix

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Upgrade Version

Upgrade to version markdownify - 0.14.1;markdownify - 0.14.1;markdownify - 0.14.1;https://github.com/matthewwithanm/python-markdownify.git - 0.14.1

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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