Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/Unstructured-IO/unstructured/commit/445c95735c4045057f51f399b
- https://github.com/Unstructured-IO/unstructured/pull/4388
- https://github.com/Unstructured-IO/unstructured/releases/tag/0.24.0
- https://github.com/Unstructured-IO/unstructured/security/advisories/GHSA-4mvj-m6
FAQ
What is CVE-2026-71428?
CVE-2026-71428 is a vulnerability with a CVSS score of 9.3 (CRITICAL). 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 argu...
How severe is CVE-2026-71428?
CVE-2026-71428 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-71428?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.