---
id: CVE-2026-71428
title: >-
  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
summary: >-
  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, an…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-601
  - CWE-918
vendor: unstructured
product: unstructured
affected:
  - 'unstructured >= 0.4.7, < 0.24.0'
patched:
  - unstructured 0.24.0
published: '2026-08-20'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71428'
references:
  - url: >-
      https://github.com/Unstructured-IO/unstructured/commit/445c95735c4045057f51f399bc04c657751923bd
    label: security-advisories@github.com
  - url: 'https://github.com/Unstructured-IO/unstructured/pull/4388'
    label: security-advisories@github.com
  - url: 'https://github.com/Unstructured-IO/unstructured/releases/tag/0.24.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Unstructured-IO/unstructured/security/advisories/GHSA-4mvj-m6j5-pmf7
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71428'
  - url: 'https://github.com/Unstructured-IO/unstructured'
  - url: 'https://pypi.org/project/unstructured'
  - url: 'https://github.com/advisories/GHSA-4mvj-m6j5-pmf7'
tags:
  - nvd
  - osv
  - pip
  - ghsa
epss: 0.0025
epssPercentile: 0.16707
aliases:
  - GHSA-4mvj-m6j5-pmf7
  - PYSEC-2026-3930
ecosystem: pip
ingestedAt: '2026-09-03T17:06:01.507Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-71428)

Affected packages:

- `unstructured >= 0.4.7, < 0.24.0`

Patched in:

- `unstructured 0.24.0`

Source: https://osv.dev/vulnerability/GHSA-4mvj-m6j5-pmf7