josdejong mathjs up to 15.1.x Expressions Math.js dynamically-determined object attributes

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in josdejong mathjs up to 15.1.x. It has been classified as critical. This impacts an unknown function of the file Math.js of the component Expressions Handler. Performing a manipulation results in dynamically-determined object attributes. This vulnerability is identified as CVE-2026-40897. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in josdejong mathjs up to 15.1.x. It has been classified as critical. This affects an unknown code block of the file Math.js of the component Expressions Handler. The manipulation with an unknown input leads to a dynamically-determined object attributes vulnerability. CWE is classifying the issue as CWE-915. The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Math.js is an extensive math library for JavaScript and Node.js. From 13.1.1 to before 15.2.0, a vulnerability allowed executing arbitrary JavaScript via the expression parser of mathjs. You can be affected when you have an application where users can evaluate arbitrary expressions using the mathjs expression parser. This vulnerability is fixed in 15.2.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-40897 since 04/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 15.2.0 eliminates this vulnerability. Applying the patch 513ab2a0e01004af91b31aada68fae8a821326ad is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (GitHub_M): 🔒

CVSSv2info

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

Exploitinginfo

Class: Dynamically-determined object attributes
CWE: CWE-915 / CWE-913
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

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: mathjs 15.2.0
Patch: 513ab2a0e01004af91b31aada68fae8a821326ad

Timelineinfo

04/15/2026 CVE reserved
04/24/2026 +9 days Advisory disclosed
04/24/2026 +0 days VulDB entry created
04/24/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-29qv-4j9f-fjw5
Status: Confirmed

CVE: CVE-2026-40897 (🔒)
GCVE (CVE): GCVE-0-2026-40897
GCVE (VulDB): GCVE-100-359511

Entryinfo

Created: 04/24/2026 20:49
Changes: 04/24/2026 20:49 (67)
Complete: 🔍
Cache ID: 216::103

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