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CVE-2026-104250

unstructured: Stored XSS via unescaped HTML generation

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. Prior to 0.24.1, partition_html(html_parser_version="v2") and the VLM partitioner can preserve untrusted document tags, attributes, text, and link targets in metadata.text_as_html, while elements_to_html() emits the result as an HTML document. The to_html() path in unstructured/documents/ontology.py does not escape output or reject unsafe URL schemes, allowing event-handler attributes, attribute breakout markup, and javascript: links to survive parsing. When the generated HTML or text_as_html is rendered in a browser, attacker-controlled script can execute in the viewer's origin, including in document-ingestion workflows where a privileged reviewer opens submitted content. This issue is fixed in version 0.24.1.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Unstructured-io
Products
Unstructured
CVE-2026-71428

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

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 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Unstructured-io
Products
Unstructured
CVE-2025-64712

Unstructured has Path Traversal via Malicious MSG Attachment that Allows Arbitrary File Write

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. Prior to version 0.18.18, a path traversal vulnerability in the partition_msg function allows an attacker to write or overwrite arbitrary files on the filesystem when processing malicious MSG files with attachments. This issue has been patched in version 0.18.18.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
Unstructured Unstructured-io
Products
Unstructured Unstructured