CVE-2026-40190

MEDIUM

5.6

Descricao

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.5.18, the LangSmith JavaScript/TypeScript SDK (langsmith) contains an incomplete prototype pollution fix in its internally vendored lodash set() utility. The baseAssignValue() function only guards against the __proto__ key, but fails to prevent traversal via constructor.prototype. This allows an attacker who controls keys in data processed by the createAnonymizer() API to pollute Object.prototype, affecting all objects in the Node.js process. This vulnerability is fixed in 0.5.18.

Detalhes CVE

Pontuacao CVSS v3.15.6

SeveridadeMEDIUM

Vetor CVSSCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Vetor de ataqueNETWORK

ComplexidadeHIGH

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado4/10/2026

Ultima modificacao4/13/2026

Fontenvd

Avistamentos honeypot0

Fraquezas (CWE)

CWE-1321

Referencias

https://github.com/langchain-ai/langsmith-sdk/security/advisories/GHSA-fw9q-39r9-c252(security-advisories@github.com)

Correlacoes IOC

Sem correlacoes registradas

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