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CVE-2026-71428— unstructured: Server-Side Request Forgery in the URL-based partitioning

Quick assessment

Affected
Unstructured-IO unstructured
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.

Unstructured是Unstructured公司开源的一个处理非结构化数据的平台。 Unstructured 0.4.7版本至0.24.0之前版本存在安全漏洞，该漏洞源于url参数在获取时未进行主机验证，可能导致攻击者控制URL请求回环地址、内部HTTP服务或云元数据端点，造成内部响应泄露。

CVSS 9.3 · Critical EPSS 0.44% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unstructured-IO unstructured >= 0.4.7, < 0.24.0 affected
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I. Basic Information for CVE-2026-71428

Vulnerability Information
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Vulnerability Title
unstructured: Server-Side Request Forgery in the URL-based partitioning
Source: CVE Program / CVE List V5
Vulnerability Description
The unstructured library provides open-source components for ingesting and pre-processing images and text documents, such as PDFs, HTML, Word docs, and many more. From 0.4.7 until 0.24.0, the url argument of partition, partition_html, and partition_md is fetched without host validation in unstructured/partition/auto.py, unstructured/partition/html/partition.py, and unstructured/partition/md.py. An attacker who controls that URL can make a server-side ingestion service request loopback addresses, internal HTTP services, or cloud metadata endpoints through direct targets, redirects, or DNS rebinding. The response body is returned as Element text, allowing internal response disclosure, and side-effecting GET endpoints may also be triggered. This issue is fixed in version 0.24.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Unstructured 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Unstructured是Unstructured公司开源的一个处理非结构化数据的平台。 Unstructured 0.4.7版本至0.24.0之前版本存在安全漏洞，该漏洞源于url参数在获取时未进行主机验证，可能导致攻击者控制URL请求回环地址、内部HTTP服务或云元数据端点，造成内部响应泄露。
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
Unstructured-IO unstructured >= 0.4.7, < 0.24.0 -

II. Public POCs for CVE-2026-71428

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III. Intelligence Information for CVE-2026-71428

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Patches & Fixes for CVE-2026-71428 (2)

Vendor Advisories for CVE-2026-71428 (1)

Vendor Pages for CVE-2026-71428 (1)

IV. Related Vulnerabilities

Same product: unstructured
Same vendor: Unstructured-IO
Same weakness: CWE-601

V. Comments for CVE-2026-71428

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