Vulnerability Description
toml-node is a TOML parser for Node.js and the browser. Prior to 5.0.1, toml.parse() can write attacker-controlled properties to Object.prototype because quoteDottedString() in lib/compiler.js produces the same bookkeeping string for distinct quoted key paths, allowing addTableArray() to clear another key's guard. The assign() path then descends through an unowned Date value without applying the owned-container check and can reach the prototype chain. Objects created elsewhere in the process can inherit the injected property. This issue is fixed in version 5.0.1.
Related Weaknesses (CWE)
References
- https://github.com/BinaryMuse/toml-node/commit/609c873fffea0a27ebe5b4dd098eed2b3
- https://github.com/BinaryMuse/toml-node/releases/tag/v5.0.1
- https://github.com/BinaryMuse/toml-node/security/advisories/GHSA-h895-cgqg-jf52
FAQ
What is CVE-2026-114142?
CVE-2026-114142 is a documented vulnerability. toml-node is a TOML parser for Node.js and the browser. Prior to 5.0.1, toml.parse() can write attacker-controlled properties to Object.prototype because quoteDottedString() in lib/compiler.js produce...
How severe is CVE-2026-114142?
CVSS scoring is not yet available for CVE-2026-114142. Check NVD for updates.
Is there a patch for CVE-2026-114142?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.