Critical, CVSS 9.8npmAmendedPublished
Remote Code Execution (RCE) via String Literal Injection into math-codegen
CVE-2026-41507 · GHSA-p6x5-p4xf-cc4r
- Affected
- npm math-codegen < 0.4.3
- Fixed in
- 0.4.3· Vendor fix available
- Issue
- 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.
Recommended action: Upgrade to 0.4.3 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.