CVE-2024-0243 / GHSA-h9j7-5xvc-qhg5 · severity: low · CVSS 3.7 · PyPI

Affected

• langchain < 0.1.0 → fixed in 0.1.0

Details

With the following crawler configuration:

from bs4 import BeautifulSoup as Soup

url = "https://example.com"
loader = RecursiveUrlLoader(
    url=url, max_depth=2, extractor=lambda x: Soup(x, "html.parser").text 
)
docs = loader.load()

An attacker in control of the contents of https://example.com could place a malicious HTML file in there with links like "https://example.completely.different/my_file.html" and the crawler would proceed to download that file as well even though prevent_outside=True.

https://github.com/langchain-ai/langchain/blob/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22/libs/community/langchain_community/document_loaders/recursive_url_loader.py#L51-L51

Resolved in https://github.com/langchain-ai/langchain/pull/15559

Source: GHSA-h9j7-5xvc-qhg5 — GitHub Advisory Database (CC-BY-4.0).