CVE-2025-46656

Published Apr 26, 2025 CVSS 3.1 · 2.9 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-12476 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.
Github GHSA Github GHSA GHSA-7mpr-5m44-h73r markdownify allows large headline prefixes such as <h9999999>, which causes memory consumption
History
Type Values Removed Values Added
First Time appeared Matthewwithanm
Matthewwithanm markdownify
CPEs cpe:2.3:a:matthewwithanm:markdownify:*:*:*:*:*:python:*:*
Vendors & Products Matthewwithanm
Matthewwithanm markdownify
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-1284
Metrics cvssV3_1

{'score': 2.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Apr 29, 2025, 3:22 PM
Reserved
Apr 26, 2025, 12:00 AM
Status
Analyzed
Published
Apr 26, 2025, 10:15 PM
Modified
Jun 17, 2026, 9:26 AM