Vulnerability · Published Aug 20, 2026 · Assigned by GitHub_M
CVE-2026-71428unstructured: Server-Side Request Forgery in the URL-based partitioning
Critical 9.3
In plain English
A critical-severity open redirect in unstructured from Unstructured-IO. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | unstructured | 0.24.0 | GHSA-4mvj-m6j5-pmf7 |
| PyPI | unstructured | 0.24.0 | PYSEC-2026-3930 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unstructured-IO | unstructured | >= 0.4.7, < 0.24.0 |
Weakness: CWE-601, CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
References
- https://github.com/Unstructured-IO/unstructured/security/advisories/GHSA-4mvj-m6j5-pmf7 x_refsource_CONFIRM
- https://github.com/Unstructured-IO/unstructured/pull/4388 x_refsource_MISC
- https://github.com/Unstructured-IO/unstructured/commit/445c95735c4045057f51f399bc04c657751923bd x_refsource_MISC
- https://github.com/Unstructured-IO/unstructured/releases/tag/0.24.0 x_refsource_MISC