Arbitrary Code Execution in mathjs

published 2017-11-27 8 y ago modified 2026-06-17 4 mo ago also GHSA-pv8x-p9hq-j328 , EUVD-2017-0365

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

math.js before 3.17.0 had an issue where private properties such as a constructor could be replaced by using unicode characters when creating an object.

Patch / fix

fixed in 2 links 1

npm mathjs 3.17.0
mathjs_project mathjs 3.17.0

github.com/josdejong/mathjs@a60f3c8 commit

Exploit prediction

1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	mathjs	<3.17.0	3.17.0

Affected products

math.js math.js

Classification

Weakness

CWE-88 Improper Neutralization of Argument Delimiters in a Command
CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary