{"id":"PYSEC-2024-235","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","aliases":["CVE-2024-0243","GHSA-h9j7-5xvc-qhg5","PYSEC-2026-1509"],"modified":"2026-07-07T17:56:41.991383859Z","published":"2024-02-26T16:27:49Z","references":[{"type":"WEB","url":"https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861"},{"type":"FIX","url":"https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22"},{"type":"REPORT","url":"https://github.com/langchain-ai/langchain/pull/15559"}],"affected":[{"package":{"name":"langchain-exa","ecosystem":"PyPI","purl":"pkg:pypi/langchain-exa"},"ranges":[{"type":"GIT","repo":"https://github.com/langchain-ai/langchain","events":[{"introduced":"0"},{"fixed":"bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22"},{"fixed":"bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.1.0"}]}],"versions":["0.0.1"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/langchain-exa/PYSEC-2024-235.yaml"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}