PYSEC-2024-235

Vulnerability from pysec - Published: 2024-02-26 16:27 - Updated: 2025-02-26 02:48
VLAI?
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

Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Impacted products
Name purl
langchain-exa pkg:pypi/langchain-exa
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "langchain-exa",
        "purl": "pkg:pypi/langchain-exa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22"
            },
            {
              "fixed": "bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22"
            }
          ],
          "repo": "https://github.com/langchain-ai/langchain",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-0243"
  ],
  "details": "With the following crawler configuration:\n\n```python\nfrom bs4 import BeautifulSoup as Soup\n\nurl = \"https://example.com\"\nloader = RecursiveUrlLoader(\n    url=url, max_depth=2, extractor=lambda x: Soup(x, \"html.parser\").text\n)\ndocs = loader.load()\n```\n\nAn 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`.\n\nhttps://github.com/langchain-ai/langchain/blob/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22/libs/community/langchain_community/document_loaders/recursive_url_loader.py#L51-L51\n\nResolved in https://github.com/langchain-ai/langchain/pull/15559",
  "id": "PYSEC-2024-235",
  "modified": "2025-02-26T02:48:56.937312+00:00",
  "published": "2024-02-26T16:27:49+00:00",
  "references": [
    {
      "type": "EVIDENCE",
      "url": "https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langchain-ai/langchain/pull/15559"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/langchain-ai/langchain/pull/15559"
    },
    {
      "type": "REPORT",
      "url": "https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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