CVE-2026-40897: Math.js is an extensive math library for JavaScript and Node.js

Q: How do I fix CVE-2026-40897?

mathjs: upgrade to 15.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-40897 being exploited?

CVE-2026-40897 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40897 affect?

CVE-2026-40897 affects mathjs. Severity is high (CVSS 8.8). 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 wher

This month

HIGH 8.8UPGRADE

CVE-2026-40897 is a high-severity flaw (CVSS 8.8) affecting mathjs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-915, CWE-917
Published	2026-04-24
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: mathjs

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-24 17:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

mathjs mathjs UPGRADE

Affected: >= 13.1.1 and < 15.2.0

Fixed in: 15.2.0

Safe to downgrade to: a release before 13.1.1

1. Check installed version

npm ls mathjs

2. UPGRADE to 15.2.0

npm install mathjs@">=15.2.0"

3. If no update is available yet, DOWNGRADE to a release before 13.1.1

npm view mathjs versions npm install mathjs@"<13.1.1"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40897?

mathjs: upgrade to 15.2.0. Exact commands for each OS are on this page.

Is CVE-2026-40897 being exploited?

CVE-2026-40897 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40897 affect?

CVE-2026-40897 affects mathjs. Severity is high (CVSS 8.8). 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 wher

How urgent is CVE-2026-40897?

Priority 42/100. High severity

Software pages

Node.js vulnerabilities

Related CVEs

CVE-2026-41139 HIGH 8.8 UPGRADE Math.js is an extensive math library for JavaScript and Node.js

References

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