---
title: "CVE-2026-71428: unstructured: Server-Side Request Forgery in the URL-based partitioning"
url: https://erroneo.us/security/cve/CVE-2026-71428/
description: "CVE-2026-71428 (unstructured (PyPI)): The unstructured library provides open-source components for ingesting and pre-processing images and text documents…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-08-20
date_modified: 2026-09-03
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-71428"
kev: false
cvss: 9.3
epss: 0.00436
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.4% , percentile 37: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 37% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes unstructured (PyPI) >= 0.4.7, < 0.24.0, fixed in 0.24.0 . Check your lockfile, including transitive dependencies.

## What it is

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, partitionhtml, and partitionmd 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.

## Affected packages

- PyPI `unstructured` >= 0.4.7, < 0.24.0 → fixed: 0.24.0

## Affected products (CVE record)

- Unstructured-IO unstructured: >= 0.4.7, < 0.24.0

## Severity

- GitHub_M CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N`
- GitHub CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.44% probability of exploitation activity in the next 30 days; percentile 37.

## Sources

- [GitHub Advisory GHSA-4mvj-m6j5-pmf7](https://github.com/advisories/GHSA-4mvj-m6j5-pmf7)
- [CVE.org record CVE-2026-71428](https://www.cve.org/CVERecord?id=CVE-2026-71428)
- [NVD entry CVE-2026-71428](https://nvd.nist.gov/vuln/detail/CVE-2026-71428)
- [github.com](https://github.com/Unstructured-IO/unstructured/security/advisories/GHSA-4mvj-m6j5-pmf7)
- [github.com](https://github.com/Unstructured-IO/unstructured/pull/4388)
- [github.com](https://github.com/Unstructured-IO/unstructured/commit/445c95735c4045057f51f399bc04c657751923bd)
- [github.com](https://github.com/Unstructured-IO/unstructured/releases/tag/0.24.0)

---
Source page: https://erroneo.us/security/cve/CVE-2026-71428/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt