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

> Attackers can exploit unstructured library to perform Server-Side Request Forgery, accessing internal services and cloud metadata via crafted URLs.

- **Severity:** Critical 9.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Aug 2026
- **Updated:** 25 Aug 2026
- **Also known as:** GHSA-4mvj-m6j5-pmf7, PYSEC-2026-3930

## What is CVE-2026-71428?

CVE-2026-71428 is a critical server-side request forgery vulnerability in Unstructured-IO unstructured, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-918 (Server-Side Request Forgery), CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-71428?

3 open source packages ship an affected version, including unstructured.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `unstructured` | PyPI | From 0.4.7 | 0.24.0 |
| `unstructured` | PyPI | From 0.4.7 | 0.24.0 |
| `unstructured` | PyPI | From 0.4.7 | 0.24.0 |

## How do I fix CVE-2026-71428?

Upgrade unstructured to 0.24.0 or later.

## Is CVE-2026-71428 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-71428 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-71428 and fix it if it is affected.

What it is: CVE-2026-71428 is a critical server-side request forgery vulnerability in Unstructured-IO unstructured, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-71428 exists.

Affected packages and fixed versions:
- unstructured (PyPI): affected from 0.4.7; fixed in 0.24.0
- unstructured (PyPI): affected from 0.4.7; fixed in 0.24.0
- unstructured (PyPI): affected from 0.4.7; fixed in 0.24.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-71428/ (Markdown: https://insights.sbomify.com/CVE-2026-71428/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-71428
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-71428
- OSV: https://osv.dev/vulnerability/CVE-2026-71428

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-71428/
Summaries are generated and may contain mistakes; the official description above is the record.