fast-xml-parser prior 4.1.2 Attribute Name prototype pollution

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in fast-xml-parser. This affects an unknown function of the component Attribute Name Handler. The manipulation results in prototype pollution. This vulnerability is known as CVE-2023-26920. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in fast-xml-parser. It has been classified as problematic. Affected is an unknown part of the component Attribute Name Handler. The manipulation with an unknown input leads to a prototype pollution vulnerability. CWE is classifying the issue as CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. This is going to have an impact on integrity.

The weakness was published 06/13/2023. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-26920 since 02/27/2023. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.

The vulnerability scanner Nessus provides a plugin with the ID 299726 (Linux Distros Unpatched Vulnerability : CVE-2023-26920), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (299726). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Prototype pollution
CWE: CWE-1321 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 299726
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-26920

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: fast-xml-parser 4.1.2

Timelineinfo

02/27/2023 🔍
06/13/2023 +105 days 🔍
06/13/2023 +0 days 🔍
02/22/2026 +984 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2023-26920 (🔍)
GCVE (CVE): GCVE-0-2023-26920
GCVE (VulDB): GCVE-100-231360

Entryinfo

Created: 06/13/2023 15:56
Updated: 02/22/2026 00:02
Changes: 06/13/2023 15:56 (36), 02/22/2026 00:02 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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