What is the CVSS score of CVE-2025-46656?

CVE-2025-46656 has a CVSS 3.1 base score of 2.9 (Low). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.1%.

Which versions of Python are affected by CVE-2025-46656?

CVE-2025-46656 is a low-severity vulnerability (CVSS 2.9). The limited severity suggests constrained impact, typically requiring specific conditions or local access for exploitation.. A patch is available.

Is there a public PoC exploit available for CVE-2025-46656?

Yes, a public proof-of-concept exploit is available for CVE-2025-46656. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-46656?

During next maintenance window: Apply vendor patches when convenient. Vendor patch is available.

Python CVE-2025-46656

LOW

Improper Validation of Specified Quantity in Input (CWE-1284)

2025-04-26 cve@mitre.org

Python Information Disclosure Markdownify

2.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

2.9 LOW

AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:38 vuln.today

Patch released

Mar 28, 2026 - 18:38 nvd

Patch available

PoC Detected

Oct 16, 2025 - 20:24 vuln.today

Public exploit code

CVE Published

Apr 26, 2025 - 22:15 nvd

LOW 2.9

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

51 pypi packages depend on markdownify (39 direct, 13 indirect)

Ecosystem-wide dependent count for version 0.14.1.

DescriptionCVE.org

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.

AnalysisAI

python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as <h9999999> in addition to <h1> through <h6>. Rated low severity (CVSS 2.9), this vulnerability is no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-1284. 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 products include: Matthewwithanm Markdownify. Version information: before 0.14.1.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.