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I. Basic Information for CVE-2026-25521
Vulnerability Information

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Vulnerability Title
Locutus is vulnerable to Prototype Pollution
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
Locutus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Locutus是Locutus开源的一个JavaScript代码库。 Locutus 2.0.12版本至2.0.39之前版本存在安全漏洞,该漏洞源于用户输入检查不足,可能导致原型污染。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
locutusjslocutus >= 2.0.12, < 2.0.39 -
II. Public POCs for CVE-2026-25521
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III. Intelligence Information for CVE-2026-25521
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IV. Related Vulnerabilities
V. Comments for CVE-2026-25521

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