Remote Code Execution (RCE) via String Literal Injection into math-codegen
Impact
String literal content passed to cg.parse() is injected verbatim into a new Function() body without sanitization. This allows an attacker to execute arbitrary system commands when user-controlled input reaches the parser. Any application exposing a math evaluation endpoint where user input flows into cg.parse() is vulnerable to full RCE.
Patches
The vulnerability is addressed by using JSON.stringify() on string literal values in lib/node/ConstantNode.js to ensure they are treated as data rather than code. Users should upgrade to version 0.4.3 or later.
Workarounds
Avoid passing un-sanitized user input to the parser or manually escape string literals in the input.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | math-codegen | < 0.4.3 | 0.4.3 |
References
- https://github.com/mauriciopoppe/math-codegen/security/advisories/GHSA-p6x5-p4xf-cc4r
- https://nvd.nist.gov/vuln/detail/CVE-2026-41507
- https://github.com/mauriciopoppe/math-codegen/pull/11
- https://github.com/mauriciopoppe/math-codegen/commit/4bb52d3030683362b3559ee8dd91350555a05f6b
- https://github.com/hits3134
- https://github.com/mauriciopoppe/math-codegen
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-94- Platform
- npm
- Package
math-codegen- Disclosed
- 17.04.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-p6x5-p4xf-cc4r - CC BY 4.0
Vulnerability history: math-codegen
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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