Description
With the following crawler configuration:
```python 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
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| langchain-ai | langchain-ai/langchain | >= unspecified, < 0.1.0 |
| langchain-ai | langchain-ai\/langchain | < 0.1.0 |
References
- https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22Patch
- https://github.com/langchain-ai/langchain/pull/15559Issue Tracking, Patch
- https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861Exploit, Issue Tracking, Third Party Advisory
- https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22Patch
- https://github.com/langchain-ai/langchain/pull/15559Issue Tracking, Patch
- https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861Exploit, Issue Tracking, Third Party Advisory
Timeline
- Published
- Feb 26, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed