Stirling-Tools Stirling-PDF up to 2.5.1 PDF File Parser pdf path traversal

Summaryinfo

A vulnerability labeled as critical has been found in Stirling-Tools Stirling-PDF up to 2.5.1. The impacted element is an unknown function of the file /api/v1/convert/markdown/pdf of the component PDF File Parser. Such manipulation leads to path traversal. This vulnerability is referenced as CVE-2026-27625. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Stirling-Tools Stirling-PDF up to 2.5.1 and classified as critical. Affected by this issue is an unknown part of the file /api/v1/convert/markdown/pdf of the component PDF File Parser. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. CVE summarizes:

Stirling-PDF is a locally hosted web application that performs various operations on PDF files. In versions prior to 2.5.2, the /api/v1/convert/markdown/pdf endpoint extracts user-supplied ZIP entries without path checks. Any authenticated user can write files outside the intended temporary working directory, leading to arbitrary file write with the privileges of the Stirling-PDF process user (stirlingpdfuser). This can overwrite writable files and compromise data integrity, with further impact depending on writable paths. The issue was fixed in version 2.5.2.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-27625 since 02/20/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 2.5.2 eliminates this vulnerability.

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Productinfo

Vendor

• Stirling-Tools

Name

• Stirling-PDF

Version

• 2.5.0
• 2.5.1

Website

• Product: https://github.com/Stirling-Tools/Stirling-PDF/

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