Vulnerability DatabaseCVE-2025-46656
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2025-46656
April 26, 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.
Affected Packages
markdownify (CONDA):
Affected version(s) >=0.11.6 <0.14.1
Fix Suggestion:
Update to version 0.14.1
https://github.com/matthewwithanm/python-markdownify.git (GITHUB):
Affected version(s) >=0.1.0 <0.14.1
Fix Suggestion:
Update to version 0.14.1
markdownify (PYTHON):
Affected version(s) >=0.2.0 <0.14.1
Fix Suggestion:
Update to version 0.14.1
markdownify (PYTHON):
Affected version(s)
Fix Suggestion:
Update to version 0.14.1
Related Resources (5)
https://github.com/matthewwithanm/python-markdownify
https://github.com/matthewwithanm/python-markdownify/commit/959561879693bf4a576f99c6733b50b01186aa08
https://nvd.nist.gov/vuln/detail/CVE-2025-46656
https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1
https://github.com/matthewwithanm/python-markdownify/issues/143
Do you need more information?
Contact Us
CVSS v4
Base Score:
2.1
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
2.9
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Improper Validation of Specified Quantity in Input
CWE-1284
EPSS
Base Score:
0.07