CVE-2025-46656

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-46656
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.

2.9 /10

CVSS v3 : LOW

V3 Legend

Vector :

Exploitability : 1.4 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1 Patch
https://github.com/matthewwithanm/python-markdownify/issues/143 Exploit
https://github.com/matthewwithanm/python-markdownify/issues/143 Exploit
Configurations

Configuration 1 (hide)

cpe:2.3:a:matthewwithanm:markdownify:*:*:*:*:*:python:*:*
History

16 Oct 2025, 20:24

Type Values Removed Values Added
References () https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1 - () https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1 - Patch
References () https://github.com/matthewwithanm/python-markdownify/issues/143 - () https://github.com/matthewwithanm/python-markdownify/issues/143 - Exploit
CPE cpe:2.3:a:matthewwithanm:markdownify:*:*:*:*:*:python:*:*
First Time Matthewwithanm markdownify
Matthewwithanm

29 Apr 2025, 16:15

Type Values Removed Values Added
References () https://github.com/matthewwithanm/python-markdownify/issues/143 - () https://github.com/matthewwithanm/python-markdownify/issues/143 -

29 Apr 2025, 13:52

Type Values Removed Values Added
Summary
  • (es) La versión 0.14.1 de Python-markdownify (también conocida como markdownify) permite prefijos de encabezado largos, como , además de los prefijos a . Esto consume memoria.

26 Apr 2025, 22:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-26 22:15

Updated : 2025-10-16 20:24

NVD link : CVE-2025-46656

Mitre link : CVE-2025-46656

CVE.ORG link : CVE-2025-46656

JSON object : View

Products Affected

matthewwithanm

  • markdownify
CWE
CWE-1284

Improper Validation of Specified Quantity in Input