CVE-2024-0243

Server-side Request Forgery In Recursive URL Loader

HIGH
8.1
CVSS Score
Published: February 24, 2024 at 05:59 PM UTC
Updated: June 17, 2026 at 06:53 AM UTC
2 products affected across 2 vendorsLangchainLangChain

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Severity
HIGH8.1
Exploit prediction
EPSS 0.5%
SSVC
PoC

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.1.0
Affected range stops below 0.1.0, so it looks safe — our inference, not a vendor statement
v < 0.1.0
Affected range stops below 0.1.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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