CVE-2025-64712 CRITICAL

CVE-2025-64712: Unstructured has Path Traversal via Malicious MSG Attachment that Allows Arbitrary File Write

Vendor Unstructured-Io
Product unstructured
Weakness CWE-22 · Path traversal
Published February 4, 2026
Last update February 4, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 4, 2026 CVE published
February 4, 2026 Record updated