by Kastro
Paper/Archive/CVE-2026-71428

CVE-2026-71428

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

EPSS 0.4%public exploitCVSS 9.3
critical.is priorityof 100
46
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 37.9.379 × 207.6Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
unstructured>= 0.4.7, < 0.24.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: partial

References

refgithub.com/Unstructured-IO/unstructured/security/advisories/GHSA-4mvj-m6j5-pmf7refgithub.com/Unstructured-IO/unstructured/pull/4388refgithub.com/Unstructured-IO/unstructured/commit/445c95735c4045057f51f399bc04c657751923bdrefgithub.com/Unstructured-IO/unstructured/releases/tag/0.24.0