CVE-2024-0243Public exploit

Server-side request forgery via prefix-only origin validation

Published Feb 24, 2024 · Updated Apr 22, 2025

Server-side request forgery in LangChain before 0.1.0 allows attackers to make RecursiveUrlLoader fetch attacker-chosen URLs. extract_sub_links compares each absolute URL to the allowed base URL with a string-prefix check instead of parsing and matching the scheme and network location. Exploitation requires an application to crawl an attacker-controlled page with prevent_outside enabled; successful requests can reach an unintended origin.

CVSS severity8.1
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in LangChain before 0.1.0 allows attackers to make RecursiveUrlLoader fetch attacker-chosen URLs. extract_sub_links compares each absolute URL to the allowed base URL with a string-prefix check instead of parsing and matching the scheme and network location. Exploitation requires an application to crawl an attacker-controlled page with prevent_outside enabled; successful requests can reach an unintended origin.

The record

CVE
CVE-2024-0243
Published
Feb 24, 2024
Updated
Apr 22, 2025
Vendor
LangChain
Product
LangChain
Classifications
CWE-918
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.1.0
  2. Affected versionversion=unspecified <0.1.0

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

LangChain · LangChainversion=0 <0.1.0; version=unspecified <0.1.0

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.7huntr.devCVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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