CVE-2026-41139Network attack vector

Code execution via non-array matrix index

Published May 7, 2026 · Updated May 7, 2026

Code injection in Math.js 13.1.0 through versions before 15.2.0 allows remote authenticated users to execute arbitrary JavaScript. The matrix get operation accepts a non-array index object and treats it as an array, invoking attacker-controlled behavior during expression evaluation. Reachability requires an application to evaluate user-controlled expressions; resulting code runs with the privileges of the JavaScript host.

CVSS severity8.8
High
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Math.js 13.1.0 through versions before 15.2.0 allows remote authenticated users to execute arbitrary JavaScript. The matrix get operation accepts a non-array index object and treats it as an array, invoking attacker-controlled behavior during expression evaluation. Reachability requires an application to evaluate user-controlled expressions; resulting code runs with the privileges of the JavaScript host.

The record

CVE
CVE-2026-41139
Published
May 7, 2026
Updated
May 7, 2026
Vendor
Jos de Jong
Product
Math.js
Classifications
CWE-915, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 13.1.0, < 15.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jos de Jong · Math.jsversion=>= 13.1.0, < 15.2.0

Published CVSS scores

8.8GitHub, Inc.CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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