Description

Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. In versions from 2.0.12 to before 2.0.39, a prototype pollution vulnerability exists in locutus. Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using String.prototype. This issue has been patched in version 2.0.39.

INFO

Published Date :

2026-02-04T21:20:32.643Z

Last Modified :

2026-02-05T14:31:43.203Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-25521 vulnerability.

Vendors Products
Locutus
  • Locutus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-25521.

URL Resource
https://github.com/locutusjs/locutus/commit/042af9ca7fde2ff599120783e720a17f335bb01c cve-icon cve-icon cve-icon
https://github.com/locutusjs/locutus/security/advisories/GHSA-rxrv-835q-v5mh cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-25521 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-25521 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Detailed values of each vector for above chart.
Attack Vector
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User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact