unstructured: Server-Side Request Forgery in the URL-based partitioning
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unstructured-IO | unstructured | 0.4.7 to before 0.24.0 | 0.24.0 | Patch available | CNA |
| — | unstructured (PyPI) | 0.4.7 to before 0.24.0 | 0.24.0 | Patch available | GHSA-4mvj-m6j5-pmf7 |
- unstructured VendorUnstructured-IO Affected 0.4.7 to before 0.24.0 Fixed in 0.24.0 Patch available CNA
- unstructured (PyPI) Vendor— Affected 0.4.7 to before 0.24.0 Fixed in 0.24.0 Patch available GHSA-4mvj-m6j5-pmf7
Remediation
- Fix · CNA unstructured (Unstructured-IO) Fixed in 0.24.0
- Fix · GHSA-4mvj-m6j5-pmf7 unstructured (PyPI) Fixed in 0.24.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-71428
- 2026-10-03 Alias added: GHSA-4mvj-m6j5-pmf7
References
Other 5
- https://github.com/Unstructured-IO/unstructured/security/advisories/GHSA-4mvj-m6j5-pmf7
- https://github.com/Unstructured-IO/unstructured/pull/4388
- https://github.com/Unstructured-IO/unstructured/commit/445c95735c4045057f51f399bc04c657751923bd
- https://github.com/Unstructured-IO/unstructured/releases/tag/0.24.0
- https://github.com/Unstructured-IO/unstructured
More Unstructured-IO vulnerabilities
- TI-2026-71944 Stored cross-site scripting in unstructured HTML generation CVSS 3.1MEDIUM 6.1
Sources
- CVE-2026-71428 · CVE Program
- CVE-2026-71428 · NVD
- FIRST EPSS
- GHSA-4mvj-m6j5-pmf7 · GitHub Advisory Database · CC BY 4.0
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