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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
2.9 LOW
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
mitreCNA
2.9 LOW
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA-ADPADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 5%
VendorProductVersion
matthewwithanmmarkdownify
𝑥
< 0.14.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1
https://github.com/matthewwithanm/python-markdownify/issues/143
https://github.com/matthewwithanm/python-markdownify/issues/143