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CVE-2026-34071— Stirling-PDF has Stored Cross Site Scripting (XSS) via EML-to-HTML Export

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 2.7.3版本存在跨站脚本漏洞，该漏洞源于/api/v1/convert/eml/pdf端点参数downloadHtml=true返回未清理的电子邮件正文HTML，可能导致攻击者通过恶意电子邮件在用户使用下载HTML中间文件功能时执行JavaScript。

CVSS 5.4 · Medium EPSS 0.31% · P22
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I. Basic Information for CVE-2026-34071

Vulnerability Information
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Vulnerability Title
Stirling-PDF has Stored Cross Site Scripting (XSS) via EML-to-HTML Export
Source: CVE Program / CVE List V5
Vulnerability Description
Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. In version 2.7.3, the /api/v1/convert/eml/pdf endpoint with parameter downloadHtml=true returns unsanitized HTML from the email body with Content-Type: text/html. An attacker who sends a malicious email to a Stirling-PDF user can achieve JavaScript execution when that user exports the email using the "Download HTML intermediate file" feature. Version 2.8.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Stirling-PDF 跨站脚本漏洞
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 2.7.3版本存在跨站脚本漏洞，该漏洞源于/api/v1/convert/eml/pdf端点参数downloadHtml=true返回未清理的电子邮件正文HTML，可能导致攻击者通过恶意电子邮件在用户使用下载HTML中间文件功能时执行JavaScript。
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 = 2.7.3 -

II. Public POCs for CVE-2026-34071

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III. Intelligence Information for CVE-2026-34071

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Vendor Advisories for CVE-2026-34071 (1)

IV. Related Vulnerabilities

Same product: Stirling-PDF
Same vendor: Stirling-Tools
Same weakness: CWE-79

V. Comments for CVE-2026-34071

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