Open Redirect in Unstructured-Io Unstructured
CVE-2026-71428
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.
Vulnerability class: Open Redirect
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N.
Affected products
- Unstructured-io Unstructured — versions >= 0.4.7, < 0.24.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-71428?
- CVE-2026-71428 is a critical-severity vulnerability in Unstructured-Io Unstructured, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 9.3/10. Published 2026-08-20.
- How severe is CVE-2026-71428?
- Critical severity. CVSS v3 base score is 9.3 out of 10.