CVE-2026-33436: 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…

PriorityP429medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

0.17%

6.5th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
stirling-tools	stirling-pdf	< 2.0.0	2.0.0
stirlingpdf	stirling_pdf	< 2.0.0	2.0.0

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