What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-04 · updated 2026-06-17
• Weakness: CWE-22

Description

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.

Affected products

• Unstructured-IO unstructured: before 0.18.18 — fixed in 0.18.18

How to fix

Upgrade to a fixed version: Unstructured-IO unstructured 0.18.18. Check the vendor advisory for mitigations.

References

• https://github.com/Unstructured-IO/unstructured/commit/b01d35b2373fd087d2e15162b9c021663c97155d
• https://github.com/Unstructured-IO/unstructured/security/advisories/GHSA-gm8q-m8mv-jj5m

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