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CVE-2026-33436— Stirling-PDF: Reflected XSS through crafted filename in file upload functionality

Quick assessment

Affected
Stirling-Tools Stirling-PDF
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Stirling-PDF是Stirling Tools开源的一个使用 Docker 的强大、本地托管的基于 Web 的 PDF 操作工具。 Stirling-PDF 2.0.0之前版本存在安全漏洞，该漏洞源于文件上传端点使用innerHTML等方法直接渲染用户提供的文件名，可能导致反射型跨站脚本攻击。

CVSS 3.1 · Low EPSS 0.17% · P7
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I. Basic Information for CVE-2026-33436

Vulnerability Information
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Vulnerability Title
Stirling-PDF: Reflected XSS through crafted filename in file upload functionality
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Stirling-PDF 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Stirling-PDF是Stirling Tools开源的一个使用 Docker 的强大、本地托管的基于 Web 的 PDF 操作工具。 Stirling-PDF 2.0.0之前版本存在安全漏洞，该漏洞源于文件上传端点使用innerHTML等方法直接渲染用户提供的文件名，可能导致反射型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Stirling-Tools Stirling-PDF < 2.0.0 -

II. Public POCs for CVE-2026-33436

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III. Intelligence Information for CVE-2026-33436

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Vendor Advisories for CVE-2026-33436 (1)

IV. Related Vulnerabilities

Same product: Stirling-PDF
Same vendor: Stirling-Tools
Same weakness: CWE-20

V. Comments for CVE-2026-33436

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