Stirling-Tools Stirling-PDF up to 1.x PDF File information disclosure

Summaryinfo

A vulnerability was found in Stirling-Tools Stirling-PDF up to 1.x. It has been classified as problematic. This impacts an unknown function of the component PDF File Handler. Performing a manipulation results in information disclosure. This vulnerability is known as CVE-2026-33436. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Stirling-Tools Stirling-PDF up to 1.x. It has been classified as problematic. This affects an unknown code block of the component PDF File Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Stirling-PDF is a locally hosted web application that facilitates various operations on PDF files. In versions prior to 2.0.0, file upload endpoints render user-supplied filenames directly into HTML using unsafe methods like innerHTML without sanitization. An attacker can craft a file with a malicious filename containing JavaScript that executes in the uploading user's browser context, resulting in reflected XSS. The issue affects numerous upload endpoints across the application. The issue has been fixed in version 2.0.0.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-33436 since 03/19/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 2.0.0 eliminates this vulnerability.

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Productinfo

Vendor

• Stirling-Tools

Name

• Stirling-PDF

Version

• 1.x

Website

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

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CPE 2.2info

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