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CVE-2026-41481— LangChain: HTMLHeaderTextSplitter.split_text_from_url SSRF Redirect Bypass

Quick assessment

Affected
langchain-ai langchain-text-splitters
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

langchain-text-splitters是LangChain开源的一个Python包。 langchain-text-splitters 1.1.2之前版本存在代码问题漏洞，该漏洞源于HTMLHeaderTextSplitter.split_text_from_url()验证初始URL后使用requests.get()获取时启用了重定向，重定向目标未重新验证，导致指向攻击者控制服务器的URL可重定向到内部、本地主机或云元数据端点，绕过SSRF保护。

CVSS 6.5 · Medium EPSS 0.44% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
langchain-ai langchain-text-splitters < 1.1.2 affected
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I. Basic Information for CVE-2026-41481

Vulnerability Information
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Vulnerability Title
LangChain: HTMLHeaderTextSplitter.split_text_from_url SSRF Redirect Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
LangChain is a framework for building agents and LLM-powered applications. Prior to langchain-text-splitters 1.1.2, HTMLHeaderTextSplitter.split_text_from_url() validated the initial URL using validate_safe_url() but then performed the fetch with requests.get() with redirects enabled (the default). Because redirect targets were not revalidated, a URL pointing to an attacker-controlled server could redirect to internal, localhost, or cloud metadata endpoints, bypassing SSRF protections. The response body is parsed and returned as Document objects to the calling application code. Whether this constitutes a data exfiltration path depends on the application: if it exposes Document contents (or derivatives) back to the requester who supplied the URL, sensitive data from internal endpoints could be leaked. Applications that store or process Documents internally without returning raw content to the requester are not directly exposed to data exfiltration through this issue. This vulnerability is fixed in 1.1.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
langchain-text-splitters 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
langchain-text-splitters是LangChain开源的一个Python包。 langchain-text-splitters 1.1.2之前版本存在代码问题漏洞，该漏洞源于HTMLHeaderTextSplitter.split_text_from_url()验证初始URL后使用requests.get()获取时启用了重定向，重定向目标未重新验证，导致指向攻击者控制服务器的URL可重定向到内部、本地主机或云元数据端点，绕过SSRF保护。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
langchain-ai langchain-text-splitters < 1.1.2 -

II. Public POCs for CVE-2026-41481

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III. Intelligence Information for CVE-2026-41481

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Vendor Advisories for CVE-2026-41481 (1)

IV. Related Vulnerabilities

Same vendor: langchain-ai
Same weakness: CWE-918

V. Comments for CVE-2026-41481

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