LangChain Community: redirect chaining can lead to SSRF bypass via RecursiveUrlLoader

Summary A redirect-based Server-Side Request Forgery SSRF bypass exists in RecursiveUrlLoader in @langchain/community. The loader validates the initial URL but allows the underlying fetch to follow redirects automatically, which permits a transition from a safe public URL to an internal or metada...

CVE-2024-0243 Server-side Request Forgery In Recursive URL Loader

With the following crawler configuration: python from bs4 import BeautifulSoup as Soup url = "https://example.com" loader = RecursiveUrlLoader url=url, maxdepth=2, extractor=lambda x: Soupx, "html.parser".text docs = loader.load An attacker in control of the contents of https://example.com could...

PT-2024-15407 · Langchain Ai · Langchain

Name of the Vulnerable Software and Affected Versions: langchain versions prior to the version that includes the fix from https://github.com/langchain-ai/langchain/pull/15559 Description: The issue arises when an attacker controls the contents of a website, such as https://example.com, and places...