Low
Server-side Request Forgery In Recursive URL Loader
Type: advisorySources: OSV
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
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-0243
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 00:53 UTC · Revision 1
Source evidence
Server-side Request Forgery In Recursive URL Loader
core-osv · Original sourcePublished 24 Feb 2024, 17:59 UTC
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
osv:CVE-2024-0243
Complete source record
{
"id": "808f98a59a8995879d1edc23d9ab8b0f3e70890c4ecf2b7edeb53b8330062a1b",
"url": "https://osv.dev/vulnerability/CVE-2024-0243",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Server-side Request Forgery In Recursive URL Loader",
"summary": "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",
"evidence": "osv:CVE-2024-0243",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2024-0243",
"aliases": [
"CVE-2024-0243",
"GHSA-h9j7-5xvc-qhg5",
"PYSEC-2024-235",
"PYSEC-2026-1509"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N"
}
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"affected": [
{
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"range": [
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"modified": "2026-10-28T02:30:24.918519886Z",
"provider": "osv",
"references": [
"https://huntr.com/bounties/370904e7-10ac-40a4-a8d4-e2d16e1ca861",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/0xxx/CVE-2024-0243.json",
"https://nvd.nist.gov/vuln/detail/CVE-2024-0243",
"https://github.com/langchain-ai/langchain/commit/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22",
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}