CVE-2026-33436
3.1 · LOWOverview
CVE-2026-33436 is a low-severity vulnerability affecting stirlingpdf stirling_pdf. It was published on April 17, 2026 and has a CVSS 3.1 base score of 3.1 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from stirlingpdf. Update stirling_pdf to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| stirlingpdf | stirling_pdf | >= 0, < 2.0.0 | Affected |
Frequently Asked Questions
What is CVE-2026-33436?
CVE-2026-33436 is a low-severity vulnerability affecting stirlingpdf stirling_pdf. It was published on April 17, 2026 and has a CVSS 3.1 base score of 3.1 (LOW).
How severe is CVE-2026-33436?
This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-33436?
Check the references section for vendor advisories and patches from stirlingpdf. Update stirling_pdf to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-33436?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-33436 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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