python-markdownify up to 0.14.0 Headline Prefix improper validation of specified quantity in input

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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2.9$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in python-markdownify up to 0.14.0. This impacts an unknown function of the component Headline Prefix Handler. The manipulation results in improper validation of specified quantity in input. This vulnerability was named CVE-2025-46656. The attack needs to be approached locally. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in python-markdownify up to 0.14.0. It has been classified as problematic. Affected is an unknown function of the component Headline Prefix Handler. The manipulation with an unknown input leads to a improper validation of specified quantity in input vulnerability. CWE is classifying the issue as CWE-1284. The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties. This is going to have an impact on availability. CVE summarizes:

python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as in addition to through . This causes memory consumption.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-46656 since 04/26/2025. The exploitability is told to be difficult. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

Upgrading to version 0.14.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-12476). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.9
VulDB Meta Temp Score: 2.9

VulDB Base Score: 2.5
VulDB Temp Score: 2.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.3
NVD Vector: 🔍

CNA Base Score: 2.9
CNA Vector (MITRE): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of specified quantity in input
CWE: CWE-1284 / CWE-703
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: python-markdownify 0.14.1

Timelineinfo

04/26/2025 🔍
04/27/2025 +1 days 🔍
04/27/2025 +0 days 🔍
10/16/2025 +172 days 🔍

Sourcesinfo

Advisory: 143
Status: Confirmed

CVE: CVE-2025-46656 (🔍)
GCVE (CVE): GCVE-0-2025-46656
GCVE (VulDB): GCVE-100-306348
EUVD: 🔍

Entryinfo

Created: 04/27/2025 10:02
Updated: 10/16/2025 22:53
Changes: 04/27/2025 10:02 (65), 05/25/2025 21:59 (1), 10/16/2025 22:53 (12)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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