CVE-2025-46656

Published: Apr 26, 2025Modified: Jun 17, 2026

3.3

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Exploitability: 1.8 / Impact: 1.4

Source: NVD

Description

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.

Affected (1)

Products: Matthewwithanm: Markdownify

Matthewwithanm

1 product

Markdownify

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Matthewwithanm Markdownify	Before 0.14.1

Related CWEs

CWE-1284

Improper Validation of Specified Quantity in Input

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

References (3)

https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1

Source: cve@mitre.org

Patch

https://github.com/matthewwithanm/python-markdownify/issues/143

Source: cve@mitre.org

Exploit

https://github.com/matthewwithanm/python-markdownify/issues/143

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Exploit

Timeline

No history available yet.