unstructured: Server-Side Request Forgery in the URL-based partitioning

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-71428
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-20 17:19:40 UTC
Updated2026-08-20 17:19:40 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 9.3 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

EPSS: 0.002500000 probability, percentile 0.167160000 (date 2026-08-21)

Problem Types: CWE-601 | CWE-918 | CWE-601 CWE-601: URL Redirection to Untrusted Site ('Open Redirect') | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.3CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
3.1CNADECLARED9.3CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Unstructured-IO Unstructured affected >= 0.4.7, < 0.24.0 Not specified

References

ReferenceSourceLinkTags
github.com/Unstructured-IO/unstructured/pull/4388 [email protected] github.com
github.com/Unstructured-IO/unstructured/commit/445c95735c4045057f51f399b... [email protected] github.com
github.com/Unstructured-IO/unstructured/releases/tag/0.24.0 [email protected] github.com
github.com/Unstructured-IO/unstructured/security/advisories/GHSA-4mvj-m6... [email protected] github.com
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