CVE-2026-26019— LangChain 代码问题漏洞

@langchain/community affected by SSRF Bypass in RecursiveUrlLoader via insufficient URL origin validation

LangChain is a framework for building LLM-powered applications. Prior to 1.1.14, the RecursiveUrlLoader class in @langchain/community is a web crawler that recursively follows links from a starting URL. Its preventOutside option (enabled by default) is intended to restrict crawling to the same site as the base URL. The implementation used String.startsWith() to compare URLs, which does not perform semantic URL validation. An attacker who controls content on a crawled page could include links to domains that share a string prefix with the target, causing the crawler to follow links to attacker-controlled or internal infrastructure. Additionally, the crawler performed no validation against private or reserved IP addresses. A crawled page could include links targeting cloud metadata services, localhost, or RFC 1918 addresses, and the crawler would fetch them without restriction. This vulnerability is fixed in 1.1.14.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

服务端请求伪造(SSRF)

LangChain 代码问题漏洞

LangChain是LangChain开源的一个用于开发由大型语言模型 （LLM） 提供支持的应用程序的框架。 LangChain 1.1.14之前版本存在代码问题漏洞，该漏洞源于@langchain/community中的RecursiveUrlLoader类对URL验证不足，可能导致爬虫跟随攻击者控制的链接或获取内部基础设施内容。

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