Vulnerability Description
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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Stirlingpdf | Stirling Pdf | < 2.0.0 |
Related Weaknesses (CWE)
References
- https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-q5j3-4m5ExploitVendor Advisory
- https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-q5j3-4m5ExploitVendor Advisory
FAQ
What is CVE-2026-33436?
CVE-2026-33436 is a vulnerability with a CVSS score of 3.1 (LOW). 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 u...
How severe is CVE-2026-33436?
CVE-2026-33436 has been rated LOW with a CVSS base score of 3.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33436?
Check the references section above for vendor advisories and patch information. Affected products include: Stirlingpdf Stirling Pdf.