mathjs Allows Improperly Controlled Modification of Dynamically-Determined Object Attributes

CVE-2026-41139 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

This security 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.

Patches

The issue was introduced in mathjs v13.1.0, and patched in mathjs v15.2.0.

Workarounds

There is no workaround without upgrading to v15.2.0.

References

You can find out more via the commit fixing this issue: https://github.com/josdejong/mathjs/commit/24d5ee7e25e85d49619b09122f055db4139bc057 (part of PR https://github.com/josdejong/mathjs/pull/3656).

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-04-10 22:10:49 UTC
Updated
2026-05-08 19:55:45 UTC
GitHub reviewed
2026-04-10 22:10:49 UTC
NVD published
2026-05-07

EPSS Score

Score Percentile
0.07% 22.45%

CVSS Scores

Base score Version Severity Vector
8.8 3.0 —
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type Value
GHSA GHSA-jvff-x2qm-6286 ↗
CVE CVE-2026-41139 ↗

CWEs

CWE id Name
CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

Credits

  • CykuTW (finder)
  • marado (analyst)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
npm mathjs >= 13.1.0, < 15.2.0 15.2.0 —

References

cvelogic Threat Intelligence