VulnerabilityModified
CVE-2026-40897
From 13.1.1 to before 15.2.0, a vulnerability allowed executing arbitrary JavaScript via the expression parser of mathjs.
HIGH 8.8EPSS 0.55%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.55% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-915, CWE-917
- Affected
- mathjs/mathjs
- Source
- security-advisories@github.com
References
- https://github.com/josdejong/mathjs/commit/513ab2a0e01004af91b31aada68fae8a821326adPatch
- https://github.com/josdejong/mathjs/pull/3656Issue Tracking
- https://github.com/josdejong/mathjs/security/advisories/GHSA-29qv-4j9f-fjw5Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-40897
- https://bugzilla.redhat.com/show_bug.cgi?id=2461612
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40897.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.