CVE-2026-41139: mathjs Allows Improperly Controlled Modification of Dynamically-Determined Object Attributes
Affects mathjsSource GCVE Database
Not known to be exploited · CVSS 8.8 High : upgrade to 15.2.0 soon.
Data as of 27 Oct 2026, 00:07 UTC
- Patch
- Available – fixed in 15.2.0
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 7 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade mathjs to 15.2.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmmathjs | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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).
References
- github.com/josdejong/mathjs/security/advisories/GHSA-5v89-rwgr-qj6g (opens in a new tab)
- github.com/josdejong/mathjs/security/advisories/GHSA-jvff-x2qm-6286 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-41139 (opens in a new tab)
- github.com/josdejong/mathjs/pull/3656 (opens in a new tab)
- github.com/josdejong/mathjs/commit/0aee2f61866e35ffa0aef915221cdf6b026ffdd4 (opens in a new tab)
- github.com/josdejong/mathjs/commit/bcf0da46f0b8577ec03c9ecd7bff8b5c2543a611 (opens in a new tab)
- github.com/josdejong/mathjs (opens in a new tab)
- github.com/josdejong/mathjs/releases/tag/v15.2.0 (opens in a new tab)