CVE Watch15 jul 2026

CVE-2026-25521

Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. In versions from 2.0.12 to before 2.0.39, a pr

CVSS

8.8

Alto

EPSS

0.3%

p18

KEV

—

Exploit Today

0-100

Publicado: 4 feb 2026 · Última mod.: 15 jul 2026 · CWE-1321 · CWE-915

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-06-302026-07-21

Descripción técnica

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.

Referencias oficiales

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