Is CVE-2026-33436 actively exploited?

No active exploitation of CVE-2026-33436 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33436 be exploited remotely?

Yes. CVE-2026-33436 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33436?

CVE-2026-33436 has a CVSS score of 3.1 (LOW).

HOME VULNERABILITIESCVE-2026-33436

LOW

CVE-2026-33436

CWE-20Published: April 17, 2026· Updated: Apr 20, 2026

3.1

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-33436 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.