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CVE-2025-46656

Quick assessment

Affected
python-markdownify python-markdownify
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

python-markdownify是Matthew Dapena-Tretter个人开发者的一个将HTML转换为Markdown的工具。 python-markdownify 0.14.1之前版本存在安全漏洞，该漏洞源于支持过大的标题前缀，可能导致内存消耗。

CVSS 2.9 · Low EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-46656

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5
Vulnerability Title
python-markdownify 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
python-markdownify是Matthew Dapena-Tretter个人开发者的一个将HTML转换为Markdown的工具。 python-markdownify 0.14.1之前版本存在安全漏洞，该漏洞源于支持过大的标题前缀，可能导致内存消耗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
python-markdownify python-markdownify 0 ~ 0.14.1 -

II. Public POCs for CVE-2025-46656

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III. Intelligence Information for CVE-2025-46656

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Patches & Fixes for CVE-2025-46656 (1)

Proof of Concept for CVE-2025-46656 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1284

V. Comments for CVE-2025-46656

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